698673091 has 2 divisors, whose sum is σ = 698673092. Its totient is φ = 698673090.

The previous prime is 698673043. The next prime is 698673137. The reversal of 698673091 is 190376896.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 698673091 - 2⁷ = 698672963 is a prime.

It is not a weakly prime, because it can be changed into another prime (698673991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349336545 + 349336546.

It is an arithmetic number, because the mean of its divisors is an integer number (349336546).

Almost surely, 2^698673091 is an apocalyptic number.

698673091 is a deficient number, since it is larger than the sum of its proper divisors (1).

698673091 is an equidigital number, since it uses as much as digits as its factorization.

698673091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 698673091 is about 26432.4249928000. The cubic root of 698673091 is about 887.3426145832.

The spelling of 698673091 in words is "six hundred ninety-eight million, six hundred seventy-three thousand, ninety-one".