54681961 has 2 divisors, whose sum is σ = 54681962. Its totient is φ = 54681960.

The previous prime is 54681953. The next prime is 54681989. The reversal of 54681961 is 16918645.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37748736 + 16933225 = 6144^2 + 4115^2 .

It is a cyclic number.

It is not a de Polignac number, because 54681961 - 2³ = 54681953 is a prime.

It is not a weakly prime, because it can be changed into another prime (54681931) 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, 27340980 + 27340981.

It is an arithmetic number, because the mean of its divisors is an integer number (27340981).

Almost surely, 2^54681961 is an apocalyptic number.

It is an amenable number.

54681961 is a deficient number, since it is larger than the sum of its proper divisors (1).

54681961 is an equidigital number, since it uses as much as digits as its factorization.

54681961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 54681961 is about 7394.7252146378. The cubic root of 54681961 is about 379.5608060679.

The spelling of 54681961 in words is "fifty-four million, six hundred eighty-one thousand, nine hundred sixty-one".