690039 has 20 divisors (see below), whose sum is σ = 1179024. Its totient is φ = 393984.

The previous prime is 690037. The next prime is 690059. The reversal of 690039 is 930096.

It is not a de Polignac number, because 690039 - 2¹ = 690037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 689994 and 690021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690037) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42 + ... + 1175.

2⁶⁹⁰⁰³⁹ is an apocalyptic number.

690039 is a deficient number, since it is larger than the sum of its proper divisors (488985).

690039 is a wasteful number, since it uses less digits than its factorization.

690039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 690039 is about 830.6858612015. The cubic root of 690039 is about 88.3672240510.

The spelling of 690039 in words is "six hundred ninety thousand, thirty-nine".