1195880887 has 4 divisors (see below), whose sum is σ = 1196576680. Its totient is φ = 1195185096.

The previous prime is 1195880879. The next prime is 1195880909. The reversal of 1195880887 is 7880885911.

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 1195880887 - 2³ = 1195880879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1195880867) 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, 345312 + ... + 348757.

It is an arithmetic number, because the mean of its divisors is an integer number (299144170).

Almost surely, 2^1195880887 is an apocalyptic number.

1195880887 is a deficient number, since it is larger than the sum of its proper divisors (695793).

1195880887 is an equidigital number, since it uses as much as digits as its factorization.

1195880887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695792.

The product of its (nonzero) digits is 1290240, while the sum is 55.

The square root of 1195880887 is about 34581.5107680390. The cubic root of 1195880887 is about 1061.4412834338.

The spelling of 1195880887 in words is "one billion, one hundred ninety-five million, eight hundred eighty thousand, eight hundred eighty-seven".