31402663 has 2 divisors, whose sum is σ = 31402664. Its totient is φ = 31402662.

The previous prime is 31402643. The next prime is 31402703. The reversal of 31402663 is 36620413.

It is a weak prime.

It is an emirp because it is prime and its reverse (36620413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31402663 - 2²¹ = 29305511 is a prime.

It is a super-2 number, since 2×31402663² = 1972254486983138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31402633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15701331 + 15701332.

It is an arithmetic number, because the mean of its divisors is an integer number (15701332).

Almost surely, 2^31402663 is an apocalyptic number.

31402663 is a deficient number, since it is larger than the sum of its proper divisors (1).

31402663 is an equidigital number, since it uses as much as digits as its factorization.

31402663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 31402663 is about 5603.8079017754. The cubic root of 31402663 is about 315.4923450381.

The spelling of 31402663 in words is "thirty-one million, four hundred two thousand, six hundred sixty-three".