57478007 has 2 divisors, whose sum is σ = 57478008. Its totient is φ = 57478006.

The previous prime is 57477967. The next prime is 57478009. The reversal of 57478007 is 70087475.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57478007 is a prime.

Together with 57478009, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57478009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28739003 + 28739004.

It is an arithmetic number, because the mean of its divisors is an integer number (28739004).

Almost surely, 2^57478007 is an apocalyptic number.

57478007 is a deficient number, since it is larger than the sum of its proper divisors (1).

57478007 is an equidigital number, since it uses as much as digits as its factorization.

57478007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 57478007 is about 7581.4251298816. The cubic root of 57478007 is about 385.9229154241.

The spelling of 57478007 in words is "fifty-seven million, four hundred seventy-eight thousand, seven".