2391894677 has 2 divisors, whose sum is σ = 2391894678. Its totient is φ = 2391894676.

The previous prime is 2391894623. The next prime is 2391894689. The reversal of 2391894677 is 7764981932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2174450161 + 217444516 = 46631^2 + 14746^2 .

It is a cyclic number.

It is not a de Polignac number, because 2391894677 - 2¹⁸ = 2391632533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391894077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195947338 + 1195947339.

It is an arithmetic number, because the mean of its divisors is an integer number (1195947339).

Almost surely, 2^2391894677 is an apocalyptic number.

It is an amenable number.

2391894677 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391894677 is an equidigital number, since it uses as much as digits as its factorization.

2391894677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 56.

The square root of 2391894677 is about 48907.0002862576. Note that the first 3 decimals coincide. The cubic root of 2391894677 is about 1337.3569862750.

The spelling of 2391894677 in words is "two billion, three hundred ninety-one million, eight hundred ninety-four thousand, six hundred seventy-seven".