699993979 has 2 divisors, whose sum is σ = 699993980. Its totient is φ = 699993978.

The previous prime is 699993941. The next prime is 699994013. The reversal of 699993979 is 979399996.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 699993979 - 2⁹ = 699993467 is a prime.

It is not a weakly prime, because it can be changed into another prime (699993929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349996989 + 349996990.

It is an arithmetic number, because the mean of its divisors is an integer number (349996990).

Almost surely, 2^699993979 is an apocalyptic number.

699993979 is a deficient number, since it is larger than the sum of its proper divisors (1).

699993979 is an equidigital number, since it uses as much as digits as its factorization.

699993979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66961566, while the sum is 70.

The square root of 699993979 is about 26457.3993241966. The cubic root of 699993979 is about 887.9014559877.

The spelling of 699993979 in words is "six hundred ninety-nine million, nine hundred ninety-three thousand, nine hundred seventy-nine".