157785379 has 4 divisors (see below), whose sum is σ = 157816240. Its totient is φ = 157754520.

The previous prime is 157785349. The next prime is 157785389. The reversal of 157785379 is 973587751.

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 157785379 - 2⁹ = 157784867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157785349) 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, 5727 + ... + 18664.

It is an arithmetic number, because the mean of its divisors is an integer number (39454060).

Almost surely, 2^157785379 is an apocalyptic number.

157785379 is a deficient number, since it is larger than the sum of its proper divisors (30861).

157785379 is an equidigital number, since it uses as much as digits as its factorization.

157785379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30860.

The product of its digits is 1852200, while the sum is 52.

The square root of 157785379 is about 12561.2650238740. The cubic root of 157785379 is about 540.3671246069.

The spelling of 157785379 in words is "one hundred fifty-seven million, seven hundred eighty-five thousand, three hundred seventy-nine".