55725739 has 2 divisors, whose sum is σ = 55725740. Its totient is φ = 55725738.

The previous prime is 55725713. The next prime is 55725749. The reversal of 55725739 is 93752755.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55725739 - 2⁹ = 55725227 is a prime.

It is a super-2 number, since 2×55725739² = 6210715974192242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55725695 and 55725704.

It is not a weakly prime, because it can be changed into another prime (55725749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27862869 + 27862870.

It is an arithmetic number, because the mean of its divisors is an integer number (27862870).

Almost surely, 2^55725739 is an apocalyptic number.

55725739 is a deficient number, since it is larger than the sum of its proper divisors (1).

55725739 is an equidigital number, since it uses as much as digits as its factorization.

55725739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 330750, while the sum is 43.

The square root of 55725739 is about 7464.9674480201. The cubic root of 55725739 is about 381.9606398414.

It can be divided in two parts, 5572 and 5739, that added together give a palindrome (11311).

The spelling of 55725739 in words is "fifty-five million, seven hundred twenty-five thousand, seven hundred thirty-nine".