54407921 has 2 divisors, whose sum is σ = 54407922. Its totient is φ = 54407920.

The previous prime is 54407897. The next prime is 54407957. The reversal of 54407921 is 12970445.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50566321 + 3841600 = 7111^2 + 1960^2 .

It is a cyclic number.

It is not a de Polignac number, because 54407921 - 2¹⁰ = 54406897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54437921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27203960 + 27203961.

It is an arithmetic number, because the mean of its divisors is an integer number (27203961).

Almost surely, 2^54407921 is an apocalyptic number.

It is an amenable number.

54407921 is a deficient number, since it is larger than the sum of its proper divisors (1).

54407921 is an equidigital number, since it uses as much as digits as its factorization.

54407921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 54407921 is about 7376.1725169630. The cubic root of 54407921 is about 378.9256844517.

The spelling of 54407921 in words is "fifty-four million, four hundred seven thousand, nine hundred twenty-one".