2291632687 has 2 divisors, whose sum is σ = 2291632688. Its totient is φ = 2291632686.

The previous prime is 2291632633. The next prime is 2291632697. The reversal of 2291632687 is 7862361922.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2291632687 - 2⁷ = 2291632559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2291632697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1145816343 + 1145816344.

It is an arithmetic number, because the mean of its divisors is an integer number (1145816344).

Almost surely, 2^2291632687 is an apocalyptic number.

2291632687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2291632687 is an equidigital number, since it uses as much as digits as its factorization.

2291632687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 2291632687 is about 47871.0004804579. Note that the first 3 decimals coincide. The cubic root of 2291632687 is about 1318.4034659747.

Subtracting from 2291632687 its sum of digits (46), we obtain a square (2291632641 = 47871²).

The spelling of 2291632687 in words is "two billion, two hundred ninety-one million, six hundred thirty-two thousand, six hundred eighty-seven".