157849791 has 8 divisors (see below), whose sum is σ = 229599744. Its totient is φ = 95666520.

The previous prime is 157849781. The next prime is 157849801. The reversal of 157849791 is 197948751.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (157849781) and next prime (157849801).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157849791 - 2¹¹ = 157847743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157849711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2391631 + ... + 2391696.

It is an arithmetic number, because the mean of its divisors is an integer number (28699968).

Almost surely, 2^157849791 is an apocalyptic number.

157849791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157849791 is a deficient number, since it is larger than the sum of its proper divisors (71749953).

157849791 is a wasteful number, since it uses less digits than its factorization.

157849791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4783341.

The product of its digits is 635040, while the sum is 51.

The square root of 157849791 is about 12563.8286760048. The cubic root of 157849791 is about 540.4406451327.

It can be divided in two parts, 157 and 849791, that added together give a palindrome (849948).

The spelling of 157849791 in words is "one hundred fifty-seven million, eight hundred forty-nine thousand, seven hundred ninety-one".