61929013 has 2 divisors, whose sum is σ = 61929014. Its totient is φ = 61929012.

The previous prime is 61929001. The next prime is 61929029. The reversal of 61929013 is 31092916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59861169 + 2067844 = 7737^2 + 1438^2 .

It is a cyclic number.

It is not a de Polignac number, because 61929013 - 2²¹ = 59831861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61929313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30964506 + 30964507.

It is an arithmetic number, because the mean of its divisors is an integer number (30964507).

Almost surely, 2^61929013 is an apocalyptic number.

It is an amenable number.

61929013 is a deficient number, since it is larger than the sum of its proper divisors (1).

61929013 is an equidigital number, since it uses as much as digits as its factorization.

61929013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 61929013 is about 7869.4989039964. The cubic root of 61929013 is about 395.6380501358.

The spelling of 61929013 in words is "sixty-one million, nine hundred twenty-nine thousand, thirteen".