61597857 has 8 divisors (see below), whose sum is σ = 83356576. Its totient is φ = 40452192.

The previous prime is 61597831. The next prime is 61597873. The reversal of 61597857 is 75879516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61597857 - 2¹² = 61593761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61597897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153028 + ... + 153429.

It is an arithmetic number, because the mean of its divisors is an integer number (10419572).

Almost surely, 2^61597857 is an apocalyptic number.

61597857 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

61597857 is a deficient number, since it is larger than the sum of its proper divisors (21758719).

61597857 is a wasteful number, since it uses less digits than its factorization.

61597857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306527.

The product of its digits is 529200, while the sum is 48.

The square root of 61597857 is about 7848.4302252106. The cubic root of 61597857 is about 394.9315845831.

The spelling of 61597857 in words is "sixty-one million, five hundred ninety-seven thousand, eight hundred fifty-seven".