54979961 has 2 divisors, whose sum is σ = 54979962. Its totient is φ = 54979960.

The previous prime is 54979949. The next prime is 54979963. The reversal of 54979961 is 16997945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54760000 + 219961 = 7400^2 + 469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54979961 is a prime.

It is a super-2 number, since 2×54979961² = 6045592223123042, which contains 22 as substring.

Together with 54979963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54979963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27489980 + 27489981.

It is an arithmetic number, because the mean of its divisors is an integer number (27489981).

Almost surely, 2^54979961 is an apocalyptic number.

It is an amenable number.

54979961 is a deficient number, since it is larger than the sum of its proper divisors (1).

54979961 is an equidigital number, since it uses as much as digits as its factorization.

54979961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 50.

The square root of 54979961 is about 7414.8473349085. The cubic root of 54979961 is about 380.2490541843.

The spelling of 54979961 in words is "fifty-four million, nine hundred seventy-nine thousand, nine hundred sixty-one".