61902691 has 8 divisors (see below), whose sum is σ = 64523264. Its totient is φ = 59321160.

The previous prime is 61902679. The next prime is 61902697. The reversal of 61902691 is 19620916.

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

It is a cyclic number.

It is not a de Polignac number, because 61902691 - 2⁷ = 61902563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61902697) 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, 6501 + ... + 12886.

It is an arithmetic number, because the mean of its divisors is an integer number (8065408).

Almost surely, 2^61902691 is an apocalyptic number.

61902691 is a deficient number, since it is larger than the sum of its proper divisors (2620573).

61902691 is a wasteful number, since it uses less digits than its factorization.

61902691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19521.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 61902691 is about 7867.8263198929. The cubic root of 61902691 is about 395.5819888486.

The spelling of 61902691 in words is "sixty-one million, nine hundred two thousand, six hundred ninety-one".