693988 has 6 divisors (see below), whose sum is σ = 1214486. Its totient is φ = 346992.

The previous prime is 693967. The next prime is 693989. The reversal of 693988 is 889396.

693988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 692224 + 1764 = 832^2 + 42^2 .

It is not an unprimeable number, because it can be changed into a prime (693989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86745 + ... + 86752.

2⁶⁹³⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

693988 is a deficient number, since it is larger than the sum of its proper divisors (520498).

693988 is a wasteful number, since it uses less digits than its factorization.

693988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173501 (or 173499 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 693988 is about 833.0594216501. The cubic root of 693988 is about 88.5354747289.

It can be divided in two parts, 693 and 988, that added together give a square (1681 = 41²).

The spelling of 693988 in words is "six hundred ninety-three thousand, nine hundred eighty-eight".