913149661 has 4 divisors (see below), whose sum is σ = 913311324. Its totient is φ = 912988000.

The previous prime is 913149631. The next prime is 913149697. The reversal of 913149661 is 166941319.

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: 166941319 = 821 ⋅203339.

It can be written as a sum of positive squares in 2 ways, for example, as 249829636 + 663320025 = 15806^2 + 25755^2 .

It is a cyclic number.

It is not a de Polignac number, because 913149661 - 2²¹ = 911052509 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (913149631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72040 + ... + 83761.

It is an arithmetic number, because the mean of its divisors is an integer number (228327831).

Almost surely, 2^913149661 is an apocalyptic number.

It is an amenable number.

913149661 is a deficient number, since it is larger than the sum of its proper divisors (161663).

913149661 is a wasteful number, since it uses less digits than its factorization.

913149661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161662.

The product of its digits is 34992, while the sum is 40.

The square root of 913149661 is about 30218.3662860850. The cubic root of 913149661 is about 970.1688376527.

The spelling of 913149661 in words is "nine hundred thirteen million, one hundred forty-nine thousand, six hundred sixty-one".