54400309 has 2 divisors, whose sum is σ = 54400310. Its totient is φ = 54400308.

The previous prime is 54400303. The next prime is 54400321. The reversal of 54400309 is 90300445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46991025 + 7409284 = 6855^2 + 2722^2 .

It is a cyclic number.

It is not a de Polignac number, because 54400309 - 2⁹ = 54399797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54400303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27200154 + 27200155.

It is an arithmetic number, because the mean of its divisors is an integer number (27200155).

Almost surely, 2^54400309 is an apocalyptic number.

It is an amenable number.

54400309 is a deficient number, since it is larger than the sum of its proper divisors (1).

54400309 is an equidigital number, since it uses as much as digits as its factorization.

54400309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 54400309 is about 7375.6565131519. The cubic root of 54400309 is about 378.9080122894.

The spelling of 54400309 in words is "fifty-four million, four hundred thousand, three hundred nine".