739117661 has 4 divisors (see below), whose sum is σ = 759093852. Its totient is φ = 719141472.

The previous prime is 739117637. The next prime is 739117699. The reversal of 739117661 is 166711937.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166711937 = 7 ⋅23815991.

It can be written as a sum of positive squares in 2 ways, for example, as 485320900 + 253796761 = 22030^2 + 15931^2 .

It is not a de Polignac number, because 739117661 - 2¹⁴ = 739101277 is a prime.

It is a super-2 number, since 2×739117661² = 1092589833604221842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (739117061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9988040 + ... + 9988113.

It is an arithmetic number, because the mean of its divisors is an integer number (189773463).

Almost surely, 2^739117661 is an apocalyptic number.

It is an amenable number.

739117661 is a deficient number, since it is larger than the sum of its proper divisors (19976191).

739117661 is a wasteful number, since it uses less digits than its factorization.

739117661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19976190.

The product of its digits is 47628, while the sum is 41.

The square root of 739117661 is about 27186.7184669279. The cubic root of 739117661 is about 904.1445314927.

It can be divided in two parts, 7391 and 17661, that added together give a palindrome (25052).

The spelling of 739117661 in words is "seven hundred thirty-nine million, one hundred seventeen thousand, six hundred sixty-one".