69921073 has 2 divisors, whose sum is σ = 69921074. Its totient is φ = 69921072.

The previous prime is 69921041. The next prime is 69921149. The reversal of 69921073 is 37012996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56430144 + 13490929 = 7512^2 + 3673^2 .

It is a cyclic number.

It is not a de Polignac number, because 69921073 - 2⁵ = 69921041 is a prime.

It is not a weakly prime, because it can be changed into another prime (69921023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34960536 + 34960537.

It is an arithmetic number, because the mean of its divisors is an integer number (34960537).

Almost surely, 2^69921073 is an apocalyptic number.

It is an amenable number.

69921073 is a deficient number, since it is larger than the sum of its proper divisors (1).

69921073 is an equidigital number, since it uses as much as digits as its factorization.

69921073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 69921073 is about 8361.8821445892. The cubic root of 69921073 is about 411.9735761638.

The spelling of 69921073 in words is "sixty-nine million, nine hundred twenty-one thousand, seventy-three".