157775969 has 4 divisors (see below), whose sum is σ = 169912596. Its totient is φ = 145639344.

The previous prime is 157775953. The next prime is 157775977. The reversal of 157775969 is 969577751.

157775969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 68227600 + 89548369 = 8260^2 + 9463^2 .

It is a cyclic number.

It is not a de Polignac number, because 157775969 - 2⁴ = 157775953 is a prime.

It is a super-3 number, since 3×157775969³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157775269) 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, 6068294 + ... + 6068319.

It is an arithmetic number, because the mean of its divisors is an integer number (42478149).

Almost surely, 2^157775969 is an apocalyptic number.

It is an amenable number.

157775969 is a deficient number, since it is larger than the sum of its proper divisors (12136627).

157775969 is a wasteful number, since it uses less digits than its factorization.

157775969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12136626.

The product of its digits is 4167450, while the sum is 56.

The square root of 157775969 is about 12560.8904541040. The cubic root of 157775969 is about 540.3563822602.

The spelling of 157775969 in words is "one hundred fifty-seven million, seven hundred seventy-five thousand, nine hundred sixty-nine".