1057999787 has 8 divisors (see below), whose sum is σ = 1144787280. Its totient is φ = 971984160.

The previous prime is 1057999769. The next prime is 1057999807. The reversal of 1057999787 is 7879997501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1057999787 - 2⁸ = 1057999531 is a prime.

It is a super-2 number, since 2×1057999787² = 2238727098584090738, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1057999757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190112 + ... + 195597.

It is an arithmetic number, because the mean of its divisors is an integer number (143098410).

Almost surely, 2^1057999787 is an apocalyptic number.

1057999787 is a deficient number, since it is larger than the sum of its proper divisors (86787493).

1057999787 is a wasteful number, since it uses less digits than its factorization.

1057999787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385933.

The product of its (nonzero) digits is 10001880, while the sum is 62.

The square root of 1057999787 is about 32526.9086603692. The cubic root of 1057999787 is about 1018.9710843801.

The spelling of 1057999787 in words is "one billion, fifty-seven million, nine hundred ninety-nine thousand, seven hundred eighty-seven".