557406407 has 2 divisors, whose sum is σ = 557406408. Its totient is φ = 557406406.

The previous prime is 557406371. The next prime is 557406427. The reversal of 557406407 is 704604755.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 557406407 - 2⁸ = 557406151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557406427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278703203 + 278703204.

It is an arithmetic number, because the mean of its divisors is an integer number (278703204).

Almost surely, 2^557406407 is an apocalyptic number.

557406407 is a deficient number, since it is larger than the sum of its proper divisors (1).

557406407 is an equidigital number, since it uses as much as digits as its factorization.

557406407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 557406407 is about 23609.4558810660. The cubic root of 557406407 is about 822.9825979459.

The spelling of 557406407 in words is "five hundred fifty-seven million, four hundred six thousand, four hundred seven".