61373691 has 6 divisors (see below), whose sum is σ = 88650900. Its totient is φ = 40915788.

The previous prime is 61373687. The next prime is 61373699. The reversal of 61373691 is 19637316.

61373691 is a `hidden beast` number, since 613 + 7 + 36 + 9 + 1 = 666.

It is not a de Polignac number, because 61373691 - 2² = 61373687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61373699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3409641 + ... + 3409658.

It is an arithmetic number, because the mean of its divisors is an integer number (14775150).

Almost surely, 2^61373691 is an apocalyptic number.

61373691 is a deficient number, since it is larger than the sum of its proper divisors (27277209).

61373691 is a wasteful number, since it uses less digits than its factorization.

61373691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819305 (or 6819302 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 61373691 is about 7834.1362638136. The cubic root of 61373691 is about 394.4519258839.

The spelling of 61373691 in words is "sixty-one million, three hundred seventy-three thousand, six hundred ninety-one".