2391447491879 has 2 divisors, whose sum is σ = 2391447491880. Its totient is φ = 2391447491878.

The previous prime is 2391447491857. The next prime is 2391447491891. The reversal of 2391447491879 is 9781947441932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2391447491879 - 2¹² = 2391447487783 is a prime.

It is a super-3 number, since 3×2391447491879³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391447491809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195723745939 + 1195723745940.

It is an arithmetic number, because the mean of its divisors is an integer number (1195723745940).

Almost surely, 2^{2391447491879} is an apocalyptic number.

2391447491879 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391447491879 is an equidigital number, since it uses as much as digits as its factorization.

2391447491879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109734912, while the sum is 68.

The spelling of 2391447491879 in words is "two trillion, three hundred ninety-one billion, four hundred forty-seven million, four hundred ninety-one thousand, eight hundred seventy-nine".