157628897 has 4 divisors (see below), whose sum is σ = 157974276. Its totient is φ = 157283520.

The previous prime is 157628881. The next prime is 157628909. The reversal of 157628897 is 798826751.

157628897 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, and also an emirpimes, since its reverse is a distinct semiprime: 798826751 = 71 ⋅11251081.

It can be written as a sum of positive squares in 2 ways, for example, as 59043856 + 98585041 = 7684^2 + 9929^2 .

It is a cyclic number.

It is not a de Polignac number, because 157628897 - 2⁴ = 157628881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157628857) 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, 172004 + ... + 172917.

It is an arithmetic number, because the mean of its divisors is an integer number (39493569).

Almost surely, 2^157628897 is an apocalyptic number.

It is an amenable number.

157628897 is a deficient number, since it is larger than the sum of its proper divisors (345379).

157628897 is an equidigital number, since it uses as much as digits as its factorization.

157628897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345378.

The product of its digits is 1693440, while the sum is 53.

The square root of 157628897 is about 12555.0347271523. The cubic root of 157628897 is about 540.1884310393.

The spelling of 157628897 in words is "one hundred fifty-seven million, six hundred twenty-eight thousand, eight hundred ninety-seven".