31430669 has 2 divisors, whose sum is σ = 31430670. Its totient is φ = 31430668.

The previous prime is 31430599. The next prime is 31430681. The reversal of 31430669 is 96603413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31024900 + 405769 = 5570^2 + 637^2 .

It is a cyclic number.

It is not a de Polignac number, because 31430669 - 2²⁴ = 14653453 is a prime.

It is a super-2 number, since 2×31430669² = 1975773907575122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31433669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15715334 + 15715335.

It is an arithmetic number, because the mean of its divisors is an integer number (15715335).

Almost surely, 2^31430669 is an apocalyptic number.

It is an amenable number.

31430669 is a deficient number, since it is larger than the sum of its proper divisors (1).

31430669 is an equidigital number, since it uses as much as digits as its factorization.

31430669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 31430669 is about 5606.3061814353. The cubic root of 31430669 is about 315.5861062292.

The spelling of 31430669 in words is "thirty-one million, four hundred thirty thousand, six hundred sixty-nine".