31494769 has 2 divisors, whose sum is σ = 31494770. Its totient is φ = 31494768.

The previous prime is 31494767. The next prime is 31494781. The reversal of 31494769 is 96749413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31494544 + 225 = 5612^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 31494769 - 2¹ = 31494767 is a prime.

It is a super-3 number, since 3×31494769³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 31494767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31494763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15747384 + 15747385.

It is an arithmetic number, because the mean of its divisors is an integer number (15747385).

Almost surely, 2^31494769 is an apocalyptic number.

It is an amenable number.

31494769 is a deficient number, since it is larger than the sum of its proper divisors (1).

31494769 is an equidigital number, since it uses as much as digits as its factorization.

31494769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 31494769 is about 5612.0200462935. The cubic root of 31494769 is about 315.8004969695.

The spelling of 31494769 in words is "thirty-one million, four hundred ninety-four thousand, seven hundred sixty-nine".