69389993 has 2 divisors, whose sum is σ = 69389994. Its totient is φ = 69389992.

The previous prime is 69389989. The next prime is 69390029. The reversal of 69389993 is 39998396.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53173264 + 16216729 = 7292^2 + 4027^2 .

It is a cyclic number.

It is not a de Polignac number, because 69389993 - 2² = 69389989 is a prime.

It is a super-2 number, since 2×69389993² = 9629942257080098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (69389693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34694996 + 34694997.

It is an arithmetic number, because the mean of its divisors is an integer number (34694997).

Almost surely, 2^69389993 is an apocalyptic number.

It is an amenable number.

69389993 is a deficient number, since it is larger than the sum of its proper divisors (1).

69389993 is an equidigital number, since it uses as much as digits as its factorization.

69389993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2834352, while the sum is 56.

The square root of 69389993 is about 8330.0656059841. The cubic root of 69389993 is about 410.9278865828.

The spelling of 69389993 in words is "sixty-nine million, three hundred eighty-nine thousand, nine hundred ninety-three".