698720249 has 2 divisors, whose sum is σ = 698720250. Its totient is φ = 698720248.

The previous prime is 698720233. The next prime is 698720293. The reversal of 698720249 is 942027896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 691321849 + 7398400 = 26293^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 698720249 - 2⁴ = 698720233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (698720149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349360124 + 349360125.

It is an arithmetic number, because the mean of its divisors is an integer number (349360125).

Almost surely, 2^698720249 is an apocalyptic number.

It is an amenable number.

698720249 is a deficient number, since it is larger than the sum of its proper divisors (1).

698720249 is an equidigital number, since it uses as much as digits as its factorization.

698720249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 698720249 is about 26433.3170260563. The cubic root of 698720249 is about 887.3625783126.

The spelling of 698720249 in words is "six hundred ninety-eight million, seven hundred twenty thousand, two hundred forty-nine".