1057998567 has 4 divisors (see below), whose sum is σ = 1410664760. Its totient is φ = 705332376.

The previous prime is 1057998523. The next prime is 1057998569. The reversal of 1057998567 is 7658997501.

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

It is not a de Polignac number, because 1057998567 - 2⁸ = 1057998311 is a prime.

It is a super-2 number, since 2×1057998567² = 2238721935548106978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057998569) 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, 176333092 + ... + 176333097.

It is an arithmetic number, because the mean of its divisors is an integer number (352666190).

Almost surely, 2^1057998567 is an apocalyptic number.

1057998567 is a deficient number, since it is larger than the sum of its proper divisors (352666193).

1057998567 is an equidigital number, since it uses as much as digits as its factorization.

1057998567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352666192.

The product of its (nonzero) digits is 4762800, while the sum is 57.

The square root of 1057998567 is about 32526.8899066603. The cubic root of 1057998567 is about 1018.9706927149.

The spelling of 1057998567 in words is "one billion, fifty-seven million, nine hundred ninety-eight thousand, five hundred sixty-seven".