69138919 has 2 divisors, whose sum is σ = 69138920. Its totient is φ = 69138918.

The previous prime is 69138899. The next prime is 69138947. The reversal of 69138919 is 91983196.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69138919 - 2⁵ = 69138887 is a prime.

It is a super-2 number, since 2×69138919² = 9560380240977122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69138319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34569459 + 34569460.

It is an arithmetic number, because the mean of its divisors is an integer number (34569460).

Almost surely, 2^69138919 is an apocalyptic number.

69138919 is a deficient number, since it is larger than the sum of its proper divisors (1).

69138919 is an equidigital number, since it uses as much as digits as its factorization.

69138919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 46.

The square root of 69138919 is about 8314.9815994986. The cubic root of 69138919 is about 410.4316671142.

The spelling of 69138919 in words is "sixty-nine million, one hundred thirty-eight thousand, nine hundred nineteen".