749547779 has 2 divisors, whose sum is σ = 749547780. Its totient is φ = 749547778.

The previous prime is 749547763. The next prime is 749547793. The reversal of 749547779 is 977745947.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 749547779 - 2⁴ = 749547763 is a prime.

It is a super-3 number, since 3×749547779³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (749547709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374773889 + 374773890.

It is an arithmetic number, because the mean of its divisors is an integer number (374773890).

Almost surely, 2^749547779 is an apocalyptic number.

749547779 is a deficient number, since it is larger than the sum of its proper divisors (1).

749547779 is an equidigital number, since it uses as much as digits as its factorization.

749547779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15558480, while the sum is 59.

The square root of 749547779 is about 27377.8702422230. The cubic root of 749547779 is about 908.3776507925.

The spelling of 749547779 in words is "seven hundred forty-nine million, five hundred forty-seven thousand, seven hundred seventy-nine".