1187296649 has 12 divisors (see below), whose sum is σ = 1491481152. Its totient is φ = 925165560.

The previous prime is 1187296633. The next prime is 1187296661. The reversal of 1187296649 is 9466927811.

It is not a de Polignac number, because 1187296649 - 2⁴ = 1187296633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1187296649.

It is not an unprimeable number, because it can be changed into a prime (1187296699) 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, 700037 + ... + 701730.

It is an arithmetic number, because the mean of its divisors is an integer number (124290096).

Almost surely, 2^1187296649 is an apocalyptic number.

It is an amenable number.

1187296649 is a deficient number, since it is larger than the sum of its proper divisors (304184503).

1187296649 is a wasteful number, since it uses less digits than its factorization.

1187296649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401796 (or 1401785 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 53.

The square root of 1187296649 is about 34457.1712274818. The cubic root of 1187296649 is about 1058.8954463701.

The spelling of 1187296649 in words is "one billion, one hundred eighty-seven million, two hundred ninety-six thousand, six hundred forty-nine".