1113151691 has 2 divisors, whose sum is σ = 1113151692. Its totient is φ = 1113151690.

The previous prime is 1113151661. The next prime is 1113151759. The reversal of 1113151691 is 1961513111.

It is a weak prime.

It is an emirp because it is prime and its reverse (1961513111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113151691 is a prime.

It is not a weakly prime, because it can be changed into another prime (1113151661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556575845 + 556575846.

It is an arithmetic number, because the mean of its divisors is an integer number (556575846).

Almost surely, 2^1113151691 is an apocalyptic number.

1113151691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113151691 is an equidigital number, since it uses as much as digits as its factorization.

1113151691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 29.

The square root of 1113151691 is about 33363.9279911703. The cubic root of 1113151691 is about 1036.3778365107.

The spelling of 1113151691 in words is "one billion, one hundred thirteen million, one hundred fifty-one thousand, six hundred ninety-one".