69402139 has 2 divisors, whose sum is σ = 69402140. Its totient is φ = 69402138.

The previous prime is 69402131. The next prime is 69402161. The reversal of 69402139 is 93120496.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69402139 - 2³ = 69402131 is a prime.

It is not a weakly prime, because it can be changed into another prime (69402131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34701069 + 34701070.

It is an arithmetic number, because the mean of its divisors is an integer number (34701070).

Almost surely, 2^69402139 is an apocalyptic number.

69402139 is a deficient number, since it is larger than the sum of its proper divisors (1).

69402139 is an equidigital number, since it uses as much as digits as its factorization.

69402139 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 69402139 is about 8330.7946199627. The cubic root of 69402139 is about 410.9518614083.

The spelling of 69402139 in words is "sixty-nine million, four hundred two thousand, one hundred thirty-nine".