69420391 has 2 divisors, whose sum is σ = 69420392. Its totient is φ = 69420390.

The previous prime is 69420383. The next prime is 69420409. The reversal of 69420391 is 19302496.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69420391 - 2³ = 69420383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69420311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34710195 + 34710196.

It is an arithmetic number, because the mean of its divisors is an integer number (34710196).

Almost surely, 2^69420391 is an apocalyptic number.

69420391 is a deficient number, since it is larger than the sum of its proper divisors (1).

69420391 is an equidigital number, since it uses as much as digits as its factorization.

69420391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 69420391 is about 8331.8900016743. The cubic root of 69420391 is about 410.9878835254.

The spelling of 69420391 in words is "sixty-nine million, four hundred twenty thousand, three hundred ninety-one".