69981623 has 2 divisors, whose sum is σ = 69981624. Its totient is φ = 69981622.

The previous prime is 69981619. The next prime is 69981671. The reversal of 69981623 is 32618996.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69981623 - 2² = 69981619 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69980623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34990811 + 34990812.

It is an arithmetic number, because the mean of its divisors is an integer number (34990812).

Almost surely, 2^69981623 is an apocalyptic number.

69981623 is a deficient number, since it is larger than the sum of its proper divisors (1).

69981623 is an equidigital number, since it uses as much as digits as its factorization.

69981623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 69981623 is about 8365.5019574440. The cubic root of 69981623 is about 412.0924616529.

The spelling of 69981623 in words is "sixty-nine million, nine hundred eighty-one thousand, six hundred twenty-three".