1137733991 has 2 divisors, whose sum is σ = 1137733992. Its totient is φ = 1137733990.

The previous prime is 1137733973. The next prime is 1137733999. The reversal of 1137733991 is 1993377311.

It is a strong prime.

It is an emirp because it is prime and its reverse (1993377311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1137733991 - 2¹⁸ = 1137471847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1137733999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 568866995 + 568866996.

It is an arithmetic number, because the mean of its divisors is an integer number (568866996).

Almost surely, 2^1137733991 is an apocalyptic number.

1137733991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1137733991 is an equidigital number, since it uses as much as digits as its factorization.

1137733991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107163, while the sum is 44.

The square root of 1137733991 is about 33730.3126430811. The cubic root of 1137733991 is about 1043.9513119962.

The spelling of 1137733991 in words is "one billion, one hundred thirty-seven million, seven hundred thirty-three thousand, nine hundred ninety-one".