31018969 has 8 divisors (see below), whose sum is σ = 31365000. Its totient is φ = 30675072.

The previous prime is 31018957. The next prime is 31018991. The reversal of 31018969 is 96981013.

It can be written as a sum of positive squares in 4 ways, for example, as 9535744 + 21483225 = 3088^2 + 4635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31018969 - 2⁵ = 31018937 is a prime.

It is a super-2 number, since 2×31018969² = 1924352875645922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31018769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60687 + ... + 61195.

It is an arithmetic number, because the mean of its divisors is an integer number (3920625).

Almost surely, 2^31018969 is an apocalyptic number.

It is an amenable number.

31018969 is a deficient number, since it is larger than the sum of its proper divisors (346031).

31018969 is a wasteful number, since it uses less digits than its factorization.

31018969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 31018969 is about 5569.4675688076. The cubic root of 31018969 is about 314.2021262064.

The spelling of 31018969 in words is "thirty-one million, eighteen thousand, nine hundred sixty-nine".