157629289 has 4 divisors (see below), whose sum is σ = 157681620. Its totient is φ = 157576960.

The previous prime is 157629259. The next prime is 157629299. The reversal of 157629289 is 982926751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 982926751 = 10559 ⋅93089.

It can be written as a sum of positive squares in 2 ways, for example, as 42968025 + 114661264 = 6555^2 + 10708^2 .

It is a cyclic number.

It is not a de Polignac number, because 157629289 - 2⁷ = 157629161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157629209) 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, 21352 + ... + 27769.

It is an arithmetic number, because the mean of its divisors is an integer number (39420405).

Almost surely, 2^157629289 is an apocalyptic number.

It is an amenable number.

157629289 is a deficient number, since it is larger than the sum of its proper divisors (52331).

157629289 is an equidigital number, since it uses as much as digits as its factorization.

157629289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52330.

The product of its digits is 544320, while the sum is 49.

The square root of 157629289 is about 12555.0503384096. The cubic root of 157629289 is about 540.1888788288.

The spelling of 157629289 in words is "one hundred fifty-seven million, six hundred twenty-nine thousand, two hundred eighty-nine".