69890069 has 2 divisors, whose sum is σ = 69890070. Its totient is φ = 69890068.

The previous prime is 69890063. The next prime is 69890071. The reversal of 69890069 is 96009896.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68277169 + 1612900 = 8263^2 + 1270^2 .

It is a cyclic number.

It is not a de Polignac number, because 69890069 - 2¹² = 69885973 is a prime.

It is a super-2 number, since 2×69890069² = 9769243489649522, which contains 22 as substring.

Together with 69890071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69890063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34945034 + 34945035.

It is an arithmetic number, because the mean of its divisors is an integer number (34945035).

Almost surely, 2^69890069 is an apocalyptic number.

It is an amenable number.

69890069 is a deficient number, since it is larger than the sum of its proper divisors (1).

69890069 is an equidigital number, since it uses as much as digits as its factorization.

69890069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 69890069 is about 8360.0280501922. The cubic root of 69890069 is about 411.9126755103.

The spelling of 69890069 in words is "sixty-nine million, eight hundred ninety thousand, sixty-nine".