61929031 has 2 divisors, whose sum is σ = 61929032. Its totient is φ = 61929030.

The previous prime is 61929029. The next prime is 61929061. The reversal of 61929031 is 13092916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61929031 - 2¹ = 61929029 is a prime.

It is a super-2 number, since 2×61929031² = 7670409761197922, which contains 22 as substring.

Together with 61929029, it forms a pair of twin primes.

It is the 7870-th Hogben number.

It is a junction number, because it is equal to n+sod(n) for n = 61928984 and 61929002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61929001) by changing a digit.

It is a nontrivial repunit in base 7869.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30964515 + 30964516.

It is an arithmetic number, because the mean of its divisors is an integer number (30964516).

Almost surely, 2^61929031 is an apocalyptic number.

61929031 is a deficient number, since it is larger than the sum of its proper divisors (1).

61929031 is an equidigital number, since it uses as much as digits as its factorization.

61929031 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 61929031 is about 7869.5000476523. The cubic root of 61929031 is about 395.6380884672.

The spelling of 61929031 in words is "sixty-one million, nine hundred twenty-nine thousand, thirty-one".