31464991 has 2 divisors, whose sum is σ = 31464992. Its totient is φ = 31464990.

The previous prime is 31464973. The next prime is 31465003. The reversal of 31464991 is 19946413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31464991 - 2¹⁷ = 31333919 is a prime.

It is a super-3 number, since 3×31464991³ (a number of 23 digits) contains 333 as substring.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 31464991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31464941) 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, 15732495 + 15732496.

It is an arithmetic number, because the mean of its divisors is an integer number (15732496).

Almost surely, 2^31464991 is an apocalyptic number.

31464991 is a deficient number, since it is larger than the sum of its proper divisors (1).

31464991 is an equidigital number, since it uses as much as digits as its factorization.

31464991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 31464991 is about 5609.3663635031. The cubic root of 31464991 is about 315.7009368116.

The spelling of 31464991 in words is "thirty-one million, four hundred sixty-four thousand, nine hundred ninety-one".