61931923 has 2 divisors, whose sum is σ = 61931924. Its totient is φ = 61931922.

The previous prime is 61931879. The next prime is 61931927. The reversal of 61931923 is 32913916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61931923 - 2²¹ = 59834771 is a prime.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (61931927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30965961 + 30965962.

It is an arithmetic number, because the mean of its divisors is an integer number (30965962).

Almost surely, 2^61931923 is an apocalyptic number.

61931923 is a deficient number, since it is larger than the sum of its proper divisors (1).

61931923 is an equidigital number, since it uses as much as digits as its factorization.

61931923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 34.

The square root of 61931923 is about 7869.6837928852. The cubic root of 61931923 is about 395.6442469550.

The spelling of 61931923 in words is "sixty-one million, nine hundred thirty-one thousand, nine hundred twenty-three".