699815953 has 2 divisors, whose sum is σ = 699815954. Its totient is φ = 699815952.

The previous prime is 699815939. The next prime is 699815957. The reversal of 699815953 is 359518996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 692373969 + 7441984 = 26313^2 + 2728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-699815953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 699815894 and 699815903.

It is not a weakly prime, because it can be changed into another prime (699815957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349907976 + 349907977.

It is an arithmetic number, because the mean of its divisors is an integer number (349907977).

Almost surely, 2^699815953 is an apocalyptic number.

It is an amenable number.

699815953 is a deficient number, since it is larger than the sum of its proper divisors (1).

699815953 is an equidigital number, since it uses as much as digits as its factorization.

699815953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2624400, while the sum is 55.

The square root of 699815953 is about 26454.0347206244. The cubic root of 699815953 is about 887.8261777464.

The spelling of 699815953 in words is "six hundred ninety-nine million, eight hundred fifteen thousand, nine hundred fifty-three".