698621 has 16 divisors (see below), whose sum is σ = 895488. Its totient is φ = 529200.

The previous prime is 698591. The next prime is 698641. The reversal of 698621 is 126896.

It is not a de Polignac number, because 698621 - 2⁶ = 698557 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 698621.

It is not an unprimeable number, because it can be changed into a prime (698641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3206 + ... + 3416.

It is an arithmetic number, because the mean of its divisors is an integer number (55968).

2⁶⁹⁸⁶²¹ is an apocalyptic number.

It is an amenable number.

698621 is a deficient number, since it is larger than the sum of its proper divisors (196867).

698621 is a wasteful number, since it uses less digits than its factorization.

698621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272.

The product of its digits is 5184, while the sum is 32.

The square root of 698621 is about 835.8355101334. The cubic root of 698621 is about 88.7320561488.

It can be divided in two parts, 6986 and 21, that added together give a palindrome (7007).

The spelling of 698621 in words is "six hundred ninety-eight thousand, six hundred twenty-one".