61579261 has 4 divisors (see below), whose sum is σ = 61614112. Its totient is φ = 61544412.

The previous prime is 61579241. The next prime is 61579279. The reversal of 61579261 is 16297516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61579261 - 2⁵ = 61579229 is a prime.

It is a super-2 number, since 2×61579261² = 7584010770612242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61579261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61579241) 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, 14625 + ... + 18358.

It is an arithmetic number, because the mean of its divisors is an integer number (15403528).

Almost surely, 2^61579261 is an apocalyptic number.

It is an amenable number.

61579261 is a deficient number, since it is larger than the sum of its proper divisors (34851).

61579261 is a wasteful number, since it uses less digits than its factorization.

61579261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34850.

The product of its digits is 22680, while the sum is 37.

The square root of 61579261 is about 7847.2454402803. The cubic root of 61579261 is about 394.8918381412.

The spelling of 61579261 in words is "sixty-one million, five hundred seventy-nine thousand, two hundred sixty-one".