69642131 has 4 divisors (see below), whose sum is σ = 74999232. Its totient is φ = 64285032.

The previous prime is 69642121. The next prime is 69642161. The reversal of 69642131 is 13124696.

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 69642131 - 2¹⁸ = 69379987 is a prime.

It is a super-2 number, since 2×69642131² = 9700052820442322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69642121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2678531 + ... + 2678556.

It is an arithmetic number, because the mean of its divisors is an integer number (18749808).

Almost surely, 2^69642131 is an apocalyptic number.

69642131 is a deficient number, since it is larger than the sum of its proper divisors (5357101).

69642131 is a wasteful number, since it uses less digits than its factorization.

69642131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5357100.

The product of its digits is 7776, while the sum is 32.

The square root of 69642131 is about 8345.1860973857. The cubic root of 69642131 is about 411.4250057848.

The spelling of 69642131 in words is "sixty-nine million, six hundred forty-two thousand, one hundred thirty-one".