61904871 has 32 divisors (see below), whose sum is σ = 110983680. Its totient is φ = 33291648.

The previous prime is 61904867. The next prime is 61904873. The reversal of 61904871 is 17840916.

It is not a de Polignac number, because 61904871 - 2² = 61904867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61904873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6421 + ... + 12846.

It is an arithmetic number, because the mean of its divisors is an integer number (3468240).

Almost surely, 2^61904871 is an apocalyptic number.

61904871 is a deficient number, since it is larger than the sum of its proper divisors (49078809).

61904871 is a wasteful number, since it uses less digits than its factorization.

61904871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19300 (or 19294 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 61904871 is about 7867.9648575728. The cubic root of 61904871 is about 395.5866324734.

The spelling of 61904871 in words is "sixty-one million, nine hundred four thousand, eight hundred seventy-one".