698436091 has 2 divisors, whose sum is σ = 698436092. Its totient is φ = 698436090.

The previous prime is 698436059. The next prime is 698436131. The reversal of 698436091 is 190634896.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 698436091 - 2⁵ = 698436059 is a prime.

It is a super-2 number, since 2×698436091² = 975625946422720562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (698436191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349218045 + 349218046.

It is an arithmetic number, because the mean of its divisors is an integer number (349218046).

Almost surely, 2^698436091 is an apocalyptic number.

698436091 is a deficient number, since it is larger than the sum of its proper divisors (1).

698436091 is an equidigital number, since it uses as much as digits as its factorization.

698436091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 698436091 is about 26427.9414824538. The cubic root of 698436091 is about 887.2422700941.

The spelling of 698436091 in words is "six hundred ninety-eight million, four hundred thirty-six thousand, ninety-one".