61253579 has 4 divisors (see below), whose sum is σ = 61272840. Its totient is φ = 61234320.

The previous prime is 61253557. The next prime is 61253609. The reversal of 61253579 is 97535216.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61253579 - 2⁸ = 61253323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61252579) 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, 3602 + ... + 11639.

It is an arithmetic number, because the mean of its divisors is an integer number (15318210).

Almost surely, 2^61253579 is an apocalyptic number.

61253579 is a deficient number, since it is larger than the sum of its proper divisors (19261).

61253579 is a wasteful number, since it uses less digits than its factorization.

61253579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19260.

The product of its digits is 56700, while the sum is 38.

The square root of 61253579 is about 7826.4665718318. The cubic root of 61253579 is about 394.1944357984.

The spelling of 61253579 in words is "sixty-one million, two hundred fifty-three thousand, five hundred seventy-nine".