69138769 has 8 divisors (see below), whose sum is σ = 79414400. Its totient is φ = 58962816.

The previous prime is 69138767. The next prime is 69138781. The reversal of 69138769 is 96783196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 69138769 - 2¹ = 69138767 is a prime.

It is a super-2 number, since 2×69138769² = 9560338757670722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69138761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23424 + ... + 26209.

It is an arithmetic number, because the mean of its divisors is an integer number (9926800).

Almost surely, 2^69138769 is an apocalyptic number.

It is an amenable number.

69138769 is a deficient number, since it is larger than the sum of its proper divisors (10275631).

69138769 is a wasteful number, since it uses less digits than its factorization.

69138769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49839.

The product of its digits is 489888, while the sum is 49.

The square root of 69138769 is about 8314.9725796301. The cubic root of 69138769 is about 410.4313702973.

The spelling of 69138769 in words is "sixty-nine million, one hundred thirty-eight thousand, seven hundred sixty-nine".