69980917 has 2 divisors, whose sum is σ = 69980918. Its totient is φ = 69980916.

The previous prime is 69980837. The next prime is 69980929. The reversal of 69980917 is 71908996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62631396 + 7349521 = 7914^2 + 2711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69980917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69980987) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34990458 + 34990459.

It is an arithmetic number, because the mean of its divisors is an integer number (34990459).

Almost surely, 2^69980917 is an apocalyptic number.

It is an amenable number.

69980917 is a deficient number, since it is larger than the sum of its proper divisors (1).

69980917 is an equidigital number, since it uses as much as digits as its factorization.

69980917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 69980917 is about 8365.4597602284. The cubic root of 69980917 is about 412.0910758689.

The spelling of 69980917 in words is "sixty-nine million, nine hundred eighty thousand, nine hundred seventeen".