69989657 has 2 divisors, whose sum is σ = 69989658. Its totient is φ = 69989656.

The previous prime is 69989653. The next prime is 69989669. The reversal of 69989657 is 75698996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67831696 + 2157961 = 8236^2 + 1469^2 .

It is a cyclic number.

It is not a de Polignac number, because 69989657 - 2² = 69989653 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 69989596 and 69989605.

It is not a weakly prime, because it can be changed into another prime (69989651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34994828 + 34994829.

It is an arithmetic number, because the mean of its divisors is an integer number (34994829).

Almost surely, 2^69989657 is an apocalyptic number.

It is an amenable number.

69989657 is a deficient number, since it is larger than the sum of its proper divisors (1).

69989657 is an equidigital number, since it uses as much as digits as its factorization.

69989657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 59.

The square root of 69989657 is about 8365.9821300311. The cubic root of 69989657 is about 412.1082306697.

The spelling of 69989657 in words is "sixty-nine million, nine hundred eighty-nine thousand, six hundred fifty-seven".