61897086 has 24 divisors (see below), whose sum is σ = 134553744. Its totient is φ = 20564160.

The previous prime is 61897027. The next prime is 61897091. The reversal of 61897086 is 68079816.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70 + ... + 11126.

It is an arithmetic number, because the mean of its divisors is an integer number (5606406).

Almost surely, 2^61897086 is an apocalyptic number.

61897086 is an abundant number, since it is smaller than the sum of its proper divisors (72656658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61897086 is a wasteful number, since it uses less digits than its factorization.

61897086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11376 (or 11373 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 61897086 is about 7867.4701143379. The cubic root of 61897086 is about 395.5700491201.

The spelling of 61897086 in words is "sixty-one million, eight hundred ninety-seven thousand, eighty-six".