61928831 has 2 divisors, whose sum is σ = 61928832. Its totient is φ = 61928830.

The previous prime is 61928821. The next prime is 61928849. The reversal of 61928831 is 13882916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61928831 - 2⁶ = 61928767 is a prime.

It is a super-2 number, since 2×61928831² = 7670360218053122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61928821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30964415 + 30964416.

It is an arithmetic number, because the mean of its divisors is an integer number (30964416).

Almost surely, 2^61928831 is an apocalyptic number.

61928831 is a deficient number, since it is larger than the sum of its proper divisors (1).

61928831 is an equidigital number, since it uses as much as digits as its factorization.

61928831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 61928831 is about 7869.4873403545. The cubic root of 61928831 is about 395.6376625619.

The spelling of 61928831 in words is "sixty-one million, nine hundred twenty-eight thousand, eight hundred thirty-one".