55407307 has 2 divisors, whose sum is σ = 55407308. Its totient is φ = 55407306.

The previous prime is 55407293. The next prime is 55407311. The reversal of 55407307 is 70370455.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55407307 is a prime.

It is not a weakly prime, because it can be changed into another prime (55407347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27703653 + 27703654.

It is an arithmetic number, because the mean of its divisors is an integer number (27703654).

Almost surely, 2^55407307 is an apocalyptic number.

55407307 is a deficient number, since it is larger than the sum of its proper divisors (1).

55407307 is an equidigital number, since it uses as much as digits as its factorization.

55407307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 55407307 is about 7443.6084663287. The cubic root of 55407307 is about 381.2317073728.

The spelling of 55407307 in words is "fifty-five million, four hundred seven thousand, three hundred seven".