698785279 has 2 divisors, whose sum is σ = 698785280. Its totient is φ = 698785278.

The previous prime is 698785271. The next prime is 698785301. The reversal of 698785279 is 972587896.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 698785279 - 2³ = 698785271 is a prime.

It is a super-2 number, since 2×698785279² = 976601732294215682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (698785271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349392639 + 349392640.

It is an arithmetic number, because the mean of its divisors is an integer number (349392640).

Almost surely, 2^698785279 is an apocalyptic number.

698785279 is a deficient number, since it is larger than the sum of its proper divisors (1).

698785279 is an equidigital number, since it uses as much as digits as its factorization.

698785279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 61.

The square root of 698785279 is about 26434.5470738577. The cubic root of 698785279 is about 887.3901064487.

It can be divided in two parts, 69878 and 5279, that added together give a palindrome (75157).

The spelling of 698785279 in words is "six hundred ninety-eight million, seven hundred eighty-five thousand, two hundred seventy-nine".