749197881 has 12 divisors (see below), whose sum is σ = 1082480100. Its totient is φ = 499324320.

The previous prime is 749197859. The next prime is 749197903. The reversal of 749197881 is 188791947.

749197881 is a `hidden beast` number, since 7 + 491 + 9 + 78 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (749197859) and next prime (749197903).

It can be written as a sum of positive squares in 2 ways, for example, as 166410000 + 582787881 = 12900^2 + 24141^2 .

It is not a de Polignac number, because 749197881 - 2¹¹ = 749195833 is a prime.

It is a super-2 number, since 2×749197881² = 1122594929789780322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (749197811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29571 + ... + 48711.

It is an arithmetic number, because the mean of its divisors is an integer number (90206675).

Almost surely, 2^749197881 is an apocalyptic number.

It is an amenable number.

749197881 is a deficient number, since it is larger than the sum of its proper divisors (333282219).

749197881 is a wasteful number, since it uses less digits than its factorization.

749197881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23496 (or 23493 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 54.

The square root of 749197881 is about 27371.4793352497. The cubic root of 749197881 is about 908.2362815553.

The spelling of 749197881 in words is "seven hundred forty-nine million, one hundred ninety-seven thousand, eight hundred eighty-one".