54692021 has 2 divisors, whose sum is σ = 54692022. Its totient is φ = 54692020.

The previous prime is 54691993. The next prime is 54692023. The reversal of 54692021 is 12029645.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53129521 + 1562500 = 7289^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 54692021 - 2²² = 50497717 is a prime.

It is a super-2 number, since 2×54692021² = 5982434322128882, which contains 22 as substring.

Together with 54692023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54692023) 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, 27346010 + 27346011.

It is an arithmetic number, because the mean of its divisors is an integer number (27346011).

Almost surely, 2^54692021 is an apocalyptic number.

It is an amenable number.

54692021 is a deficient number, since it is larger than the sum of its proper divisors (1).

54692021 is an equidigital number, since it uses as much as digits as its factorization.

54692021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 54692021 is about 7395.4053979481. The cubic root of 54692021 is about 379.5840809438.

The spelling of 54692021 in words is "fifty-four million, six hundred ninety-two thousand, twenty-one".