61897432 has 16 divisors (see below), whose sum is σ = 117961200. Its totient is φ = 30441120.

The previous prime is 61897403. The next prime is 61897447. The reversal of 61897432 is 23479816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62932 + ... + 63907.

It is an arithmetic number, because the mean of its divisors is an integer number (7372575).

Almost surely, 2^61897432 is an apocalyptic number.

It is an amenable number.

61897432 is a deficient number, since it is larger than the sum of its proper divisors (56063768).

61897432 is a wasteful number, since it uses less digits than its factorization.

61897432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126906 (or 126902 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 61897432 is about 7867.4921035868. The cubic root of 61897432 is about 395.5707861876.

The spelling of 61897432 in words is "sixty-one million, eight hundred ninety-seven thousand, four hundred thirty-two".