157889447 has 4 divisors (see below), whose sum is σ = 158075400. Its totient is φ = 157703496.

The previous prime is 157889429. The next prime is 157889467. The reversal of 157889447 is 744988751.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157889447 - 2²⁶ = 90780583 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 (157889467) 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, 91697 + ... + 93402.

It is an arithmetic number, because the mean of its divisors is an integer number (39518850).

Almost surely, 2^157889447 is an apocalyptic number.

157889447 is a deficient number, since it is larger than the sum of its proper divisors (185953).

157889447 is an equidigital number, since it uses as much as digits as its factorization.

157889447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185952.

The product of its digits is 2257920, while the sum is 53.

The square root of 157889447 is about 12565.4067582391. The cubic root of 157889447 is about 540.4858989562.

The spelling of 157889447 in words is "one hundred fifty-seven million, eight hundred eighty-nine thousand, four hundred forty-seven".