31066369 has 4 divisors (see below), whose sum is σ = 31202260. Its totient is φ = 30930480.

The previous prime is 31066363. The next prime is 31066379. The reversal of 31066369 is 96366013.

It is a happy number.

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 17472400 + 13593969 = 4180^2 + 3687^2 .

It is a cyclic number.

It is not a de Polignac number, because 31066369 - 2⁹ = 31065857 is a prime.

It is a super-2 number, since 2×31066369² = 1930238565688322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31066363) 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, 67602 + ... + 68059.

It is an arithmetic number, because the mean of its divisors is an integer number (7800565).

Almost surely, 2^31066369 is an apocalyptic number.

It is an amenable number.

31066369 is a deficient number, since it is larger than the sum of its proper divisors (135891).

31066369 is a wasteful number, since it uses less digits than its factorization.

31066369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135890.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 31066369 is about 5573.7212883315. The cubic root of 31066369 is about 314.3620885522.

The spelling of 31066369 in words is "thirty-one million, sixty-six thousand, three hundred sixty-nine".