157086749 has 8 divisors (see below), whose sum is σ = 166574520. Its totient is φ = 147626496.

The previous prime is 157086731. The next prime is 157086751. The reversal of 157086749 is 947680751.

It can be written as a sum of positive squares in 4 ways, for example, as 23522500 + 133564249 = 4850^2 + 11557^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 157086749 - 2⁸ = 157086493 is a prime.

It is a super-2 number, since 2×157086749² = 49352493422778002, 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 (157086779) 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, 5537 + ... + 18569.

It is an arithmetic number, because the mean of its divisors is an integer number (20821815).

Almost surely, 2^157086749 is an apocalyptic number.

It is an amenable number.

157086749 is a deficient number, since it is larger than the sum of its proper divisors (9487771).

157086749 is a wasteful number, since it uses less digits than its factorization.

157086749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13759.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 157086749 is about 12533.4252700529. The cubic root of 157086749 is about 539.5684125820.

The spelling of 157086749 in words is "one hundred fifty-seven million, eighty-six thousand, seven hundred forty-nine".