749891061 has 16 divisors (see below), whose sum is σ = 1136787520. Its totient is φ = 488300400.

The previous prime is 749891059. The next prime is 749891071. The reversal of 749891061 is 160198947.

It is a happy number.

It is not a de Polignac number, because 749891061 - 2¹ = 749891059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 749890998 and 749891016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749891041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321790 + ... + 324111.

It is an arithmetic number, because the mean of its divisors is an integer number (71049220).

Almost surely, 2^749891061 is an apocalyptic number.

It is an amenable number.

749891061 is a deficient number, since it is larger than the sum of its proper divisors (386896459).

749891061 is a wasteful number, since it uses less digits than its factorization.

749891061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645953 (or 645947 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 749891061 is about 27384.1388581054. The cubic root of 749891061 is about 908.5163042193.

The spelling of 749891061 in words is "seven hundred forty-nine million, eight hundred ninety-one thousand, sixty-one".