55445969 has 2 divisors, whose sum is σ = 55445970. Its totient is φ = 55445968.

The previous prime is 55445953. The next prime is 55445983. The reversal of 55445969 is 96954455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41667025 + 13778944 = 6455^2 + 3712^2 .

It is a cyclic number.

It is not a de Polignac number, because 55445969 - 2⁴ = 55445953 is a prime.

It is a super-2 number, since 2×55445969² = 6148510956697922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55445989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27722984 + 27722985.

It is an arithmetic number, because the mean of its divisors is an integer number (27722985).

Almost surely, 2^55445969 is an apocalyptic number.

It is an amenable number.

55445969 is a deficient number, since it is larger than the sum of its proper divisors (1).

55445969 is an equidigital number, since it uses as much as digits as its factorization.

55445969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 47.

The square root of 55445969 is about 7446.2050065789. The cubic root of 55445969 is about 381.3203584561.

The spelling of 55445969 in words is "fifty-five million, four hundred forty-five thousand, nine hundred sixty-nine".