698444989 has 8 divisors (see below), whose sum is σ = 763100640. Its totient is φ = 633982800.

The previous prime is 698444941. The next prime is 698444993. The reversal of 698444989 is 989444896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-698444989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698444909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40759 + ... + 55300.

It is an arithmetic number, because the mean of its divisors is an integer number (95387580).

Almost surely, 2^698444989 is an apocalyptic number.

It is an amenable number.

698444989 is a deficient number, since it is larger than the sum of its proper divisors (64655651).

698444989 is a wasteful number, since it uses less digits than its factorization.

698444989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96731.

The product of its digits is 17915904, while the sum is 61.

The square root of 698444989 is about 26428.1098264708. The cubic root of 698444989 is about 887.2460378681.

The spelling of 698444989 in words is "six hundred ninety-eight million, four hundred forty-four thousand, nine hundred eighty-nine".