1137395661 has 4 divisors (see below), whose sum is σ = 1516527552. Its totient is φ = 758263772.

The previous prime is 1137395657. The next prime is 1137395759. The reversal of 1137395661 is 1665937311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1137395661 - 2² = 1137395657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1137395561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189565941 + ... + 189565946.

It is an arithmetic number, because the mean of its divisors is an integer number (379131888).

Almost surely, 2^1137395661 is an apocalyptic number.

It is an amenable number.

1137395661 is a deficient number, since it is larger than the sum of its proper divisors (379131891).

1137395661 is an equidigital number, since it uses as much as digits as its factorization.

1137395661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379131890.

The product of its digits is 102060, while the sum is 42.

The square root of 1137395661 is about 33725.2970483582. The cubic root of 1137395661 is about 1043.8478211783.

The spelling of 1137395661 in words is "one billion, one hundred thirty-seven million, three hundred ninety-five thousand, six hundred sixty-one".