69531381 has 6 divisors (see below), whose sum is σ = 100434230. Its totient is φ = 46354248.

The previous prime is 69531361. The next prime is 69531383. The reversal of 69531381 is 18313596.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 53802225 + 15729156 = 7335^2 + 3966^2 .

It is not a de Polignac number, because 69531381 - 2⁵ = 69531349 is a prime.

It is a super-2 number, since 2×69531381² = 9669225887534322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69531383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3862846 + ... + 3862863.

Almost surely, 2^69531381 is an apocalyptic number.

It is an amenable number.

69531381 is a deficient number, since it is larger than the sum of its proper divisors (30902849).

69531381 is a wasteful number, since it uses less digits than its factorization.

69531381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7725715 (or 7725712 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 69531381 is about 8338.5478951674. The cubic root of 69531381 is about 411.2067973820.

The spelling of 69531381 in words is "sixty-nine million, five hundred thirty-one thousand, three hundred eighty-one".