69942091 has 2 divisors, whose sum is σ = 69942092. Its totient is φ = 69942090.

The previous prime is 69942083. The next prime is 69942109. The reversal of 69942091 is 19024996.

Together with next prime (69942109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69942091 - 2³ = 69942083 is a prime.

It is not a weakly prime, because it can be changed into another prime (69942001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34971045 + 34971046.

It is an arithmetic number, because the mean of its divisors is an integer number (34971046).

Almost surely, 2^69942091 is an apocalyptic number.

69942091 is a deficient number, since it is larger than the sum of its proper divisors (1).

69942091 is an equidigital number, since it uses as much as digits as its factorization.

69942091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 69942091 is about 8363.1388246280. The cubic root of 69942091 is about 412.0148512414.

The spelling of 69942091 in words is "sixty-nine million, nine hundred forty-two thousand, ninety-one".