749639369 has 2 divisors, whose sum is σ = 749639370. Its totient is φ = 749639368.

The previous prime is 749639353. The next prime is 749639419. The reversal of 749639369 is 963936947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417670969 + 331968400 = 20437^2 + 18220^2 .

It is an emirp because it is prime and its reverse (963936947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 749639369 - 2⁴ = 749639353 is a prime.

It is a super-2 number, since 2×749639369² = 1123918367109436322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (749639269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374819684 + 374819685.

It is an arithmetic number, because the mean of its divisors is an integer number (374819685).

Almost surely, 2^749639369 is an apocalyptic number.

It is an amenable number.

749639369 is a deficient number, since it is larger than the sum of its proper divisors (1).

749639369 is an equidigital number, since it uses as much as digits as its factorization.

749639369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6613488, while the sum is 56.

The square root of 749639369 is about 27379.5428924590. The cubic root of 749639369 is about 908.4146486210.

The spelling of 749639369 in words is "seven hundred forty-nine million, six hundred thirty-nine thousand, three hundred sixty-nine".