157771097 has 4 divisors (see below), whose sum is σ = 172113936. Its totient is φ = 143428260.

The previous prime is 157771091. The next prime is 157771109. The reversal of 157771097 is 790177751.

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.

It is a cyclic number.

It is not a de Polignac number, because 157771097 - 2²⁶ = 90662233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157771091) 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, 7171403 + ... + 7171424.

It is an arithmetic number, because the mean of its divisors is an integer number (43028484).

Almost surely, 2^157771097 is an apocalyptic number.

It is an amenable number.

157771097 is a deficient number, since it is larger than the sum of its proper divisors (14342839).

157771097 is a wasteful number, since it uses less digits than its factorization.

157771097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14342838.

The product of its (nonzero) digits is 108045, while the sum is 44.

The square root of 157771097 is about 12560.6965173115. The cubic root of 157771097 is about 540.3508202738.

The spelling of 157771097 in words is "one hundred fifty-seven million, seven hundred seventy-one thousand, ninety-seven".