69409157 has 4 divisors (see below), whose sum is σ = 69810540. Its totient is φ = 69007776.

The previous prime is 69409139. The next prime is 69409189. The reversal of 69409157 is 75190496.

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 54671236 + 14737921 = 7394^2 + 3839^2 .

It is a cyclic number.

It is not a de Polignac number, because 69409157 - 2¹⁰ = 69408133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69409127) 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, 200432 + ... + 200777.

It is an arithmetic number, because the mean of its divisors is an integer number (17452635).

Almost surely, 2^69409157 is an apocalyptic number.

It is an amenable number.

69409157 is a deficient number, since it is larger than the sum of its proper divisors (401383).

69409157 is a wasteful number, since it uses less digits than its factorization.

69409157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401382.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 69409157 is about 8331.2158176343. The cubic root of 69409157 is about 410.9657128688.

The spelling of 69409157 in words is "sixty-nine million, four hundred nine thousand, one hundred fifty-seven".