654401057 has 4 divisors (see below), whose sum is σ = 655892160. Its totient is φ = 652909956.

The previous prime is 654401051. The next prime is 654401087. The reversal of 654401057 is 750104456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 654401057 - 2¹² = 654396961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654401051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744893 + ... + 745770.

It is an arithmetic number, because the mean of its divisors is an integer number (163973040).

Almost surely, 2^654401057 is an apocalyptic number.

It is an amenable number.

654401057 is a deficient number, since it is larger than the sum of its proper divisors (1491103).

654401057 is a wasteful number, since it uses less digits than its factorization.

654401057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491102.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 654401057 is about 25581.2637881712. The cubic root of 654401057 is about 868.1897697341.

The spelling of 654401057 in words is "six hundred fifty-four million, four hundred one thousand, fifty-seven".