749239129 has 2 divisors, whose sum is σ = 749239130. Its totient is φ = 749239128.

The previous prime is 749239121. The next prime is 749239177. The reversal of 749239129 is 921932947.

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., 452710729 + 296528400 = 21277^2 + 17220^2 .

It is a cyclic number.

It is not a de Polignac number, because 749239129 - 2³ = 749239121 is a prime.

It is a super-2 number, since 2×749239129² = 1122718544849357282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (749239121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374619564 + 374619565.

It is an arithmetic number, because the mean of its divisors is an integer number (374619565).

Almost surely, 2^749239129 is an apocalyptic number.

It is an amenable number.

749239129 is a deficient number, since it is larger than the sum of its proper divisors (1).

749239129 is an equidigital number, since it uses as much as digits as its factorization.

749239129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 749239129 is about 27372.2328099116. The cubic root of 749239129 is about 908.2529492669.

The spelling of 749239129 in words is "seven hundred forty-nine million, two hundred thirty-nine thousand, one hundred twenty-nine".