749139551 has 2 divisors, whose sum is σ = 749139552. Its totient is φ = 749139550.

The previous prime is 749139511. The next prime is 749139607. The reversal of 749139551 is 155931947.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 749139551 - 2⁶ = 749139487 is a prime.

It is a super-2 number, since 2×749139551² = 1122420133744963202, 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 (749139511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374569775 + 374569776.

It is an arithmetic number, because the mean of its divisors is an integer number (374569776).

Almost surely, 2^749139551 is an apocalyptic number.

749139551 is a deficient number, since it is larger than the sum of its proper divisors (1).

749139551 is an equidigital number, since it uses as much as digits as its factorization.

749139551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 44.

The square root of 749139551 is about 27370.4137893456. The cubic root of 749139551 is about 908.2127102139.

The spelling of 749139551 in words is "seven hundred forty-nine million, one hundred thirty-nine thousand, five hundred fifty-one".