69138899 has 2 divisors, whose sum is σ = 69138900. Its totient is φ = 69138898.

The previous prime is 69138887. The next prime is 69138919. The reversal of 69138899 is 99883196.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69138899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69138899.

It is not a weakly prime, because it can be changed into another prime (69138869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34569449 + 34569450.

It is an arithmetic number, because the mean of its divisors is an integer number (34569450).

Almost surely, 2^69138899 is an apocalyptic number.

69138899 is a deficient number, since it is larger than the sum of its proper divisors (1).

69138899 is an equidigital number, since it uses as much as digits as its factorization.

69138899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 53.

The square root of 69138899 is about 8314.9803968500. The cubic root of 69138899 is about 410.4316275386.

The spelling of 69138899 in words is "sixty-nine million, one hundred thirty-eight thousand, eight hundred ninety-nine".