69109091 has 2 divisors, whose sum is σ = 69109092. Its totient is φ = 69109090.

The previous prime is 69109069. The next prime is 69109111. The reversal of 69109091 is 19090196.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 69109091 - 2²⁶ = 2000227 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69109991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34554545 + 34554546.

It is an arithmetic number, because the mean of its divisors is an integer number (34554546).

Almost surely, 2^69109091 is an apocalyptic number.

69109091 is a deficient number, since it is larger than the sum of its proper divisors (1).

69109091 is an equidigital number, since it uses as much as digits as its factorization.

69109091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 69109091 is about 8313.1877760580. The cubic root of 69109091 is about 410.3726356410.

The spelling of 69109091 in words is "sixty-nine million, one hundred nine thousand, ninety-one".