1087891475 has 12 divisors (see below), whose sum is σ = 1471620840. Its totient is φ = 791193600.

The previous prime is 1087891457. The next prime is 1087891477. The reversal of 1087891475 is 5741987801.

It is not a de Polignac number, because 1087891475 - 2¹⁰ = 1087890451 is a prime.

It is a super-2 number, since 2×1087891475² = 2367015722755351250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1087891477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1977710 + ... + 1978259.

It is an arithmetic number, because the mean of its divisors is an integer number (122635070).

Almost surely, 2^1087891475 is an apocalyptic number.

1087891475 is a deficient number, since it is larger than the sum of its proper divisors (383729365).

1087891475 is a wasteful number, since it uses less digits than its factorization.

1087891475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955990 (or 3955985 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 50.

The square root of 1087891475 is about 32983.1998902472. The cubic root of 1087891475 is about 1028.4784380264.

The spelling of 1087891475 in words is "one billion, eighty-seven million, eight hundred ninety-one thousand, four hundred seventy-five".