55647769 has 2 divisors, whose sum is σ = 55647770. Its totient is φ = 55647768.

The previous prime is 55647737. The next prime is 55647773. The reversal of 55647769 is 96774655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39942400 + 15705369 = 6320^2 + 3963^2 .

It is a cyclic number.

It is not a de Polignac number, because 55647769 - 2⁵ = 55647737 is a prime.

It is a super-2 number, since 2×55647769² = 6193348389354722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55647469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27823884 + 27823885.

It is an arithmetic number, because the mean of its divisors is an integer number (27823885).

Almost surely, 2^55647769 is an apocalyptic number.

It is an amenable number.

55647769 is a deficient number, since it is larger than the sum of its proper divisors (1).

55647769 is an equidigital number, since it uses as much as digits as its factorization.

55647769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 49.

The square root of 55647769 is about 7459.7432261439. The cubic root of 55647769 is about 381.7824135720.

The spelling of 55647769 in words is "fifty-five million, six hundred forty-seven thousand, seven hundred sixty-nine".