55624729 has 2 divisors, whose sum is σ = 55624730. Its totient is φ = 55624728.

The previous prime is 55624717. The next prime is 55624753. The reversal of 55624729 is 92742655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49632025 + 5992704 = 7045^2 + 2448^2 .

It is a cyclic number.

It is not a de Polignac number, because 55624729 - 2⁷ = 55624601 is a prime.

It is a super-2 number, since 2×55624729² = 6188220952646882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55624691 and 55624700.

It is not a weakly prime, because it can be changed into another prime (55625729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27812364 + 27812365.

It is an arithmetic number, because the mean of its divisors is an integer number (27812365).

Almost surely, 2^55624729 is an apocalyptic number.

It is an amenable number.

55624729 is a deficient number, since it is larger than the sum of its proper divisors (1).

55624729 is an equidigital number, since it uses as much as digits as its factorization.

55624729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The square root of 55624729 is about 7458.1987771847. The cubic root of 55624729 is about 381.7297161550.

The spelling of 55624729 in words is "fifty-five million, six hundred twenty-four thousand, seven hundred twenty-nine".