1057138647 has 4 divisors (see below), whose sum is σ = 1409518200. Its totient is φ = 704759096.

The previous prime is 1057138613. The next prime is 1057138661. The reversal of 1057138647 is 7468317501.

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

It is a cyclic number.

It is not a de Polignac number, because 1057138647 - 2⁷ = 1057138519 is a prime.

It is a super-2 number, since 2×1057138647² = 2235084237961981218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1057138599 and 1057138608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057130647) 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, 176189772 + ... + 176189777.

It is an arithmetic number, because the mean of its divisors is an integer number (352379550).

Almost surely, 2^1057138647 is an apocalyptic number.

1057138647 is a deficient number, since it is larger than the sum of its proper divisors (352379553).

1057138647 is an equidigital number, since it uses as much as digits as its factorization.

1057138647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352379552.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 1057138647 is about 32513.6686179828. The cubic root of 1057138647 is about 1018.6945515783.

It can be divided in two parts, 1057138 and 647, that added together give a triangular number (1057785 = T₁₄₅₄).

The spelling of 1057138647 in words is "one billion, fifty-seven million, one hundred thirty-eight thousand, six hundred forty-seven".