698754779 has 2 divisors, whose sum is σ = 698754780. Its totient is φ = 698754778.

The previous prime is 698754767. The next prime is 698754803. The reversal of 698754779 is 977457896.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 698754779 - 2¹² = 698750683 is a prime.

It is not a weakly prime, because it can be changed into another prime (698754379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349377389 + 349377390.

It is an arithmetic number, because the mean of its divisors is an integer number (349377390).

Almost surely, 2^698754779 is an apocalyptic number.

698754779 is a deficient number, since it is larger than the sum of its proper divisors (1).

698754779 is an equidigital number, since it uses as much as digits as its factorization.

698754779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26671680, while the sum is 62.

The square root of 698754779 is about 26433.9701709751. The cubic root of 698754779 is about 887.3771955718.

The spelling of 698754779 in words is "six hundred ninety-eight million, seven hundred fifty-four thousand, seven hundred seventy-nine".