54977309 has 2 divisors, whose sum is σ = 54977310. Its totient is φ = 54977308.

The previous prime is 54977281. The next prime is 54977333. The reversal of 54977309 is 90377945.

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., 31114084 + 23863225 = 5578^2 + 4885^2 .

It is a cyclic number.

It is not a de Polignac number, because 54977309 - 2⁸ = 54977053 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54977309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54977399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27488654 + 27488655.

It is an arithmetic number, because the mean of its divisors is an integer number (27488655).

Almost surely, 2^54977309 is an apocalyptic number.

It is an amenable number.

54977309 is a deficient number, since it is larger than the sum of its proper divisors (1).

54977309 is an equidigital number, since it uses as much as digits as its factorization.

54977309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 54977309 is about 7414.6685023675. The cubic root of 54977309 is about 380.2429402191.

The spelling of 54977309 in words is "fifty-four million, nine hundred seventy-seven thousand, three hundred nine".