69609121 has 2 divisors, whose sum is σ = 69609122. Its totient is φ = 69609120.

The previous prime is 69609091. The next prime is 69609139. The reversal of 69609121 is 12190696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43230625 + 26378496 = 6575^2 + 5136^2 .

It is a cyclic number.

It is not a de Polignac number, because 69609121 - 2⁷ = 69608993 is a prime.

It is not a weakly prime, because it can be changed into another prime (69601121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34804560 + 34804561.

It is an arithmetic number, because the mean of its divisors is an integer number (34804561).

Almost surely, 2^69609121 is an apocalyptic number.

It is an amenable number.

69609121 is a deficient number, since it is larger than the sum of its proper divisors (1).

69609121 is an equidigital number, since it uses as much as digits as its factorization.

69609121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 69609121 is about 8343.2080760341. The cubic root of 69609121 is about 411.3599910894.

The spelling of 69609121 in words is "sixty-nine million, six hundred nine thousand, one hundred twenty-one".