61928929 has 2 divisors, whose sum is σ = 61928930. Its totient is φ = 61928928.

The previous prime is 61928927. The next prime is 61928957. The reversal of 61928929 is 92982916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59213025 + 2715904 = 7695^2 + 1648^2 .

It is a cyclic number.

It is not a de Polignac number, because 61928929 - 2¹ = 61928927 is a prime.

Together with 61928927, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61928921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30964464 + 30964465.

It is an arithmetic number, because the mean of its divisors is an integer number (30964465).

Almost surely, 2^61928929 is an apocalyptic number.

It is an amenable number.

61928929 is a deficient number, since it is larger than the sum of its proper divisors (1).

61928929 is an equidigital number, since it uses as much as digits as its factorization.

61928929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 46.

The square root of 61928929 is about 7869.4935669330. The cubic root of 61928929 is about 395.6378712556.

The spelling of 61928929 in words is "sixty-one million, nine hundred twenty-eight thousand, nine hundred twenty-nine".