69840997 has 2 divisors, whose sum is σ = 69840998. Its totient is φ = 69840996.

The previous prime is 69840899. The next prime is 69841021. The reversal of 69840997 is 79904896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65836996 + 4004001 = 8114^2 + 2001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69840997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69540997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34920498 + 34920499.

It is an arithmetic number, because the mean of its divisors is an integer number (34920499).

Almost surely, 2^69840997 is an apocalyptic number.

It is an amenable number.

69840997 is a deficient number, since it is larger than the sum of its proper divisors (1).

69840997 is an equidigital number, since it uses as much as digits as its factorization.

69840997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 69840997 is about 8357.0926164546. The cubic root of 69840997 is about 411.8162473541.

The spelling of 69840997 in words is "sixty-nine million, eight hundred forty thousand, nine hundred ninety-seven".