749028391 has 2 divisors, whose sum is σ = 749028392. Its totient is φ = 749028390.

The previous prime is 749028353. The next prime is 749028409. The reversal of 749028391 is 193820947.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 749028391 - 2¹³ = 749020199 is a prime.

It is a super-2 number, since 2×749028391² = 1122087061048097762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749028341) 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, 374514195 + 374514196.

It is an arithmetic number, because the mean of its divisors is an integer number (374514196).

Almost surely, 2^749028391 is an apocalyptic number.

749028391 is a deficient number, since it is larger than the sum of its proper divisors (1).

749028391 is an equidigital number, since it uses as much as digits as its factorization.

749028391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 749028391 is about 27368.3830541740. The cubic root of 749028391 is about 908.1677867108.

The spelling of 749028391 in words is "seven hundred forty-nine million, twenty-eight thousand, three hundred ninety-one".