791261641 has 4 divisors (see below), whose sum is σ = 791455252. Its totient is φ = 791068032.

The previous prime is 791261609. The next prime is 791261741. The reversal of 791261641 is 146162197.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 738263241 + 52998400 = 27171^2 + 7280^2 .

It is a cyclic number.

It is not a de Polignac number, because 791261641 - 2⁵ = 791261609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 791261641.

It is not an unprimeable number, because it can be changed into a prime (791261741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90540 + ... + 98893.

It is an arithmetic number, because the mean of its divisors is an integer number (197863813).

Almost surely, 2^791261641 is an apocalyptic number.

It is an amenable number.

791261641 is a deficient number, since it is larger than the sum of its proper divisors (193611).

791261641 is a wasteful number, since it uses less digits than its factorization.

791261641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193610.

The product of its digits is 18144, while the sum is 37.

The square root of 791261641 is about 28129.3732777679. The cubic root of 791261641 is about 924.9253958823.

The spelling of 791261641 in words is "seven hundred ninety-one million, two hundred sixty-one thousand, six hundred forty-one".