1187867879 has 16 divisors (see below), whose sum is σ = 1308971904. Its totient is φ = 1069005600.

The previous prime is 1187867851. The next prime is 1187867903. The reversal of 1187867879 is 9787687811.

It is a cyclic number.

It is not a de Polignac number, because 1187867879 - 2¹² = 1187863783 is a prime.

It is a super-2 number, since 2×1187867879² = 2822060195919917282, 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 (1187867839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506249 + ... + 508589.

It is an arithmetic number, because the mean of its divisors is an integer number (81810744).

Almost surely, 2^1187867879 is an apocalyptic number.

1187867879 is a deficient number, since it is larger than the sum of its proper divisors (121104025).

1187867879 is a wasteful number, since it uses less digits than its factorization.

1187867879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798.

The product of its digits is 9483264, while the sum is 62.

The square root of 1187867879 is about 34465.4592164387. The cubic root of 1187867879 is about 1059.0652370924.

The spelling of 1187867879 in words is "one billion, one hundred eighty-seven million, eight hundred sixty-seven thousand, eight hundred seventy-nine".