31420469 has 2 divisors, whose sum is σ = 31420470. Its totient is φ = 31420468.

The previous prime is 31420463. The next prime is 31420489. The reversal of 31420469 is 96402413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26646244 + 4774225 = 5162^2 + 2185^2 .

It is a cyclic number.

It is not a de Polignac number, because 31420469 - 2¹⁶ = 31354933 is a prime.

It is a super-2 number, since 2×31420469² = 1974491744359922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31420463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710234 + 15710235.

It is an arithmetic number, because the mean of its divisors is an integer number (15710235).

Almost surely, 2^31420469 is an apocalyptic number.

It is an amenable number.

31420469 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420469 is an equidigital number, since it uses as much as digits as its factorization.

31420469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 31420469 is about 5605.3964177389. The cubic root of 31420469 is about 315.5519641353.

The spelling of 31420469 in words is "thirty-one million, four hundred twenty thousand, four hundred sixty-nine".