157391099 has 4 divisors (see below), whose sum is σ = 157489464. Its totient is φ = 157292736.

The previous prime is 157391089. The next prime is 157391119. The reversal of 157391099 is 990193751.

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 157391099 - 2⁸ = 157390843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157391029) 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, 46742 + ... + 49995.

It is an arithmetic number, because the mean of its divisors is an integer number (39372366).

Almost surely, 2^157391099 is an apocalyptic number.

157391099 is a deficient number, since it is larger than the sum of its proper divisors (98365).

157391099 is an equidigital number, since it uses as much as digits as its factorization.

157391099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98364.

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 157391099 is about 12545.5609280733. The cubic root of 157391099 is about 539.9166526598.

The spelling of 157391099 in words is "one hundred fifty-seven million, three hundred ninety-one thousand, ninety-nine".