393057055 has 4 divisors (see below), whose sum is σ = 471668472. Its totient is φ = 314445640.

The previous prime is 393057043. The next prime is 393057061. The reversal of 393057055 is 550750393.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 393057055 - 2⁷ = 393056927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39305701 + ... + 39305710.

It is an arithmetic number, because the mean of its divisors is an integer number (117917118).

Almost surely, 2^393057055 is an apocalyptic number.

393057055 is a deficient number, since it is larger than the sum of its proper divisors (78611417).

393057055 is an equidigital number, since it uses as much as digits as its factorization.

393057055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78611416.

The product of its (nonzero) digits is 70875, while the sum is 37.

The square root of 393057055 is about 19825.6665713917. Note that the first 3 decimals coincide. The cubic root of 393057055 is about 732.5183895798.

It can be divided in two parts, 39305 and 7055, that added together give a triangular number (46360 = T₃₀₄).

The spelling of 393057055 in words is "three hundred ninety-three million, fifty-seven thousand, fifty-five".