791157149 has 4 divisors (see below), whose sum is σ = 818438460. Its totient is φ = 763875840.

The previous prime is 791157127. The next prime is 791157163. The reversal of 791157149 is 941751197.

791157149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 462895225 + 328261924 = 21515^2 + 18118^2 .

It is a cyclic number.

It is not a de Polignac number, because 791157149 - 2¹² = 791153053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791157109) 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, 13640612 + ... + 13640669.

It is an arithmetic number, because the mean of its divisors is an integer number (204609615).

Almost surely, 2^791157149 is an apocalyptic number.

It is an amenable number.

791157149 is a deficient number, since it is larger than the sum of its proper divisors (27281311).

791157149 is a wasteful number, since it uses less digits than its factorization.

791157149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27281310.

The product of its digits is 79380, while the sum is 44.

The square root of 791157149 is about 28127.5158696960. The cubic root of 791157149 is about 924.8846796581.

The spelling of 791157149 in words is "seven hundred ninety-one million, one hundred fifty-seven thousand, one hundred forty-nine".