791536381 has 4 divisors (see below), whose sum is σ = 796578172. Its totient is φ = 786494592.

The previous prime is 791536379. The next prime is 791536387. The reversal of 791536381 is 183635197.

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 412455481 + 379080900 = 20309^2 + 19470^2 .

It is a cyclic number.

It is not a de Polignac number, because 791536381 - 2¹ = 791536379 is a prime.

It is a super-2 number, since 2×791536381² = 1253059684893154322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791536387) 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, 2520660 + ... + 2520973.

It is an arithmetic number, because the mean of its divisors is an integer number (199144543).

Almost surely, 2^791536381 is an apocalyptic number.

It is an amenable number.

791536381 is a deficient number, since it is larger than the sum of its proper divisors (5041791).

791536381 is a wasteful number, since it uses less digits than its factorization.

791536381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5041790.

The product of its digits is 136080, while the sum is 43.

The square root of 791536381 is about 28134.2563612405. The cubic root of 791536381 is about 925.0324336327.

The spelling of 791536381 in words is "seven hundred ninety-one million, five hundred thirty-six thousand, three hundred eighty-one".