61758897 has 4 divisors (see below), whose sum is σ = 82345200. Its totient is φ = 41172596.

The previous prime is 61758881. The next prime is 61758919. The reversal of 61758897 is 79885716.

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 61758897 - 2⁴ = 61758881 is a prime.

It is a super-2 number, since 2×61758897² = 7628322717313218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61758817) 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, 10293147 + ... + 10293152.

It is an arithmetic number, because the mean of its divisors is an integer number (20586300).

Almost surely, 2^61758897 is an apocalyptic number.

It is an amenable number.

61758897 is a deficient number, since it is larger than the sum of its proper divisors (20586303).

61758897 is a wasteful number, since it uses less digits than its factorization.

61758897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20586302.

The product of its digits is 846720, while the sum is 51.

The square root of 61758897 is about 7858.6829049148. The cubic root of 61758897 is about 395.2754517306.

The spelling of 61758897 in words is "sixty-one million, seven hundred fifty-eight thousand, eight hundred ninety-seven".