55723949 has 2 divisors, whose sum is σ = 55723950. Its totient is φ = 55723948.

The previous prime is 55723939. The next prime is 55723973. The reversal of 55723949 is 94932755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55026724 + 697225 = 7418^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 55723949 - 2⁴ = 55723933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55723939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27861974 + 27861975.

It is an arithmetic number, because the mean of its divisors is an integer number (27861975).

Almost surely, 2^55723949 is an apocalyptic number.

It is an amenable number.

55723949 is a deficient number, since it is larger than the sum of its proper divisors (1).

55723949 is an equidigital number, since it uses as much as digits as its factorization.

55723949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 44.

The square root of 55723949 is about 7464.8475537013. The cubic root of 55723949 is about 381.9565500684.

The spelling of 55723949 in words is "fifty-five million, seven hundred twenty-three thousand, nine hundred forty-nine".