54694021 has 2 divisors, whose sum is σ = 54694022. Its totient is φ = 54694020.

The previous prime is 54694019. The next prime is 54694051. The reversal of 54694021 is 12049645.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47803396 + 6890625 = 6914^2 + 2625^2 .

It is a cyclic number.

It is not a de Polignac number, because 54694021 - 2¹ = 54694019 is a prime.

Together with 54694019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54694001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27347010 + 27347011.

It is an arithmetic number, because the mean of its divisors is an integer number (27347011).

Almost surely, 2^54694021 is an apocalyptic number.

It is an amenable number.

54694021 is a deficient number, since it is larger than the sum of its proper divisors (1).

54694021 is an equidigital number, since it uses as much as digits as its factorization.

54694021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 54694021 is about 7395.5406158036. The cubic root of 54694021 is about 379.5887078156.

The spelling of 54694021 in words is "fifty-four million, six hundred ninety-four thousand, twenty-one".