157289609 has 4 divisors (see below), whose sum is σ = 157602816. Its totient is φ = 156976404.

The previous prime is 157289597. The next prime is 157289633. The reversal of 157289609 is 906982751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 906982751 = 59 ⋅15372589.

It is a cyclic number.

It is not a de Polignac number, because 157289609 - 2¹⁶ = 157224073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157219609) 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, 155849 + ... + 156854.

It is an arithmetic number, because the mean of its divisors is an integer number (39400704).

Almost surely, 2^157289609 is an apocalyptic number.

It is an amenable number.

157289609 is a deficient number, since it is larger than the sum of its proper divisors (313207).

157289609 is an equidigital number, since it uses as much as digits as its factorization.

157289609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313206.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 157289609 is about 12541.5154188001. The cubic root of 157289609 is about 539.8005767960.

The spelling of 157289609 in words is "one hundred fifty-seven million, two hundred eighty-nine thousand, six hundred nine".