749139398369 has 2 divisors, whose sum is σ = 749139398370. Its totient is φ = 749139398368.

The previous prime is 749139398321. The next prime is 749139398437. The reversal of 749139398369 is 963893931947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388737286144 + 360402112225 = 623488^2 + 600335^2 .

It is a cyclic number.

It is not a de Polignac number, because 749139398369 - 2⁸ = 749139398113 is a prime.

It is a super-2 number, since 2×749139398369² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (749139398069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374569699184 + 374569699185.

It is an arithmetic number, because the mean of its divisors is an integer number (374569699185).

Almost surely, 2^749139398369 is an apocalyptic number.

It is an amenable number.

749139398369 is a deficient number, since it is larger than the sum of its proper divisors (1).

749139398369 is an equidigital number, since it uses as much as digits as its factorization.

749139398369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238085568, while the sum is 71.

The spelling of 749139398369 in words is "seven hundred forty-nine billion, one hundred thirty-nine million, three hundred ninety-eight thousand, three hundred sixty-nine".