69690961 has 2 divisors, whose sum is σ = 69690962. Its totient is φ = 69690960.

The previous prime is 69690893. The next prime is 69690991. The reversal of 69690961 is 16909696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66732561 + 2958400 = 8169^2 + 1720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69690961 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (69690991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34845480 + 34845481.

It is an arithmetic number, because the mean of its divisors is an integer number (34845481).

Almost surely, 2^69690961 is an apocalyptic number.

It is an amenable number.

69690961 is a deficient number, since it is larger than the sum of its proper divisors (1).

69690961 is an equidigital number, since it uses as much as digits as its factorization.

69690961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 69690961 is about 8348.1112235044. Note that the first 3 decimals coincide. The cubic root of 69690961 is about 411.5211410275.

The spelling of 69690961 in words is "sixty-nine million, six hundred ninety thousand, nine hundred sixty-one".