157391147 has 8 divisors (see below), whose sum is σ = 159691200. Its totient is φ = 155098944.

The previous prime is 157391141. The next prime is 157391159. The reversal of 157391147 is 741193751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157391147 - 2¹⁶ = 157325611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157391147.

It is not an unprimeable number, because it can be changed into a prime (157391141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47129 + ... + 50357.

It is an arithmetic number, because the mean of its divisors is an integer number (19961400).

Almost surely, 2^157391147 is an apocalyptic number.

157391147 is a deficient number, since it is larger than the sum of its proper divisors (2300053).

157391147 is an equidigital number, since it uses as much as digits as its factorization.

157391147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3925.

The product of its digits is 26460, while the sum is 38.

The square root of 157391147 is about 12545.5628411004. The cubic root of 157391147 is about 539.9167075464.

The spelling of 157391147 in words is "one hundred fifty-seven million, three hundred ninety-one thousand, one hundred forty-seven".