157749829 has 4 divisors (see below), whose sum is σ = 157798060. Its totient is φ = 157701600.

The previous prime is 157749811. The next prime is 157749853. The reversal of 157749829 is 928947751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 928947751 = 1597 ⋅581683.

It can be written as a sum of positive squares in 2 ways, for example, as 3940225 + 153809604 = 1985^2 + 12402^2 .

It is a cyclic number.

It is not a de Polignac number, because 157749829 - 2⁵ = 157749797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157749869) 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, 18822 + ... + 25879.

It is an arithmetic number, because the mean of its divisors is an integer number (39449515).

Almost surely, 2^157749829 is an apocalyptic number.

It is an amenable number.

157749829 is a deficient number, since it is larger than the sum of its proper divisors (48231).

157749829 is an equidigital number, since it uses as much as digits as its factorization.

157749829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48230.

The product of its digits is 1270080, while the sum is 52.

The square root of 157749829 is about 12559.8498796761. The cubic root of 157749829 is about 540.3265388985.

The spelling of 157749829 in words is "one hundred fifty-seven million, seven hundred forty-nine thousand, eight hundred twenty-nine".