749015389 has 2 divisors, whose sum is σ = 749015390. Its totient is φ = 749015388.

The previous prime is 749015381. The next prime is 749015413. The reversal of 749015389 is 983510947.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 684084025 + 64931364 = 26155^2 + 8058^2 .

It is an emirp because it is prime and its reverse (983510947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 749015389 - 2³ = 749015381 is a prime.

It is a super-2 number, since 2×749015389² = 1122048105917642642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749015381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374507694 + 374507695.

It is an arithmetic number, because the mean of its divisors is an integer number (374507695).

Almost surely, 2^749015389 is an apocalyptic number.

It is an amenable number.

749015389 is a deficient number, since it is larger than the sum of its proper divisors (1).

749015389 is an equidigital number, since it uses as much as digits as its factorization.

749015389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 749015389 is about 27368.1455162749. The cubic root of 749015389 is about 908.1625318740.

The spelling of 749015389 in words is "seven hundred forty-nine million, fifteen thousand, three hundred eighty-nine".