61647701 has 4 divisors (see below), whose sum is σ = 61665132. Its totient is φ = 61630272.

The previous prime is 61647689. The next prime is 61647721. The reversal of 61647701 is 10774616.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25959025 + 35688676 = 5095^2 + 5974^2 .

It is a cyclic number.

It is not a de Polignac number, because 61647701 - 2¹⁰ = 61646677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61647721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316 + ... + 11181.

It is an arithmetic number, because the mean of its divisors is an integer number (15416283).

Almost surely, 2^61647701 is an apocalyptic number.

It is an amenable number.

61647701 is a deficient number, since it is larger than the sum of its proper divisors (17431).

61647701 is a wasteful number, since it uses less digits than its factorization.

61647701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17430.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 61647701 is about 7851.6049951586. The cubic root of 61647701 is about 395.0380799692.

The spelling of 61647701 in words is "sixty-one million, six hundred forty-seven thousand, seven hundred one".