31489069 has 2 divisors, whose sum is σ = 31489070. Its totient is φ = 31489068.

The previous prime is 31489063. The next prime is 31489079. The reversal of 31489069 is 96098413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19669225 + 11819844 = 4435^2 + 3438^2 .

It is a cyclic number.

It is not a de Polignac number, because 31489069 - 2⁵ = 31489037 is a prime.

It is a super-2 number, since 2×31489069² = 1983122932973522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31489063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15744534 + 15744535.

It is an arithmetic number, because the mean of its divisors is an integer number (15744535).

Almost surely, 2^31489069 is an apocalyptic number.

It is an amenable number.

31489069 is a deficient number, since it is larger than the sum of its proper divisors (1).

31489069 is an equidigital number, since it uses as much as digits as its factorization.

31489069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 31489069 is about 5611.5121847858. The cubic root of 31489069 is about 315.7814443724.

The spelling of 31489069 in words is "thirty-one million, four hundred eighty-nine thousand, sixty-nine".