690501 has 16 divisors (see below), whose sum is σ = 1064448. Its totient is φ = 390000.

The previous prime is 690493. The next prime is 690509. The reversal of 690501 is 105096.

It is an interprime number because it is at equal distance from previous prime (690493) and next prime (690509).

It is not a de Polignac number, because 690501 - 2³ = 690493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an alternating number because its digits alternate between even and odd.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690509) 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, 2626 + ... + 2876.

It is an arithmetic number, because the mean of its divisors is an integer number (66528).

2⁶⁹⁰⁵⁰¹ is an apocalyptic number.

It is an amenable number.

690501 is a deficient number, since it is larger than the sum of its proper divisors (373947).

690501 is a wasteful number, since it uses less digits than its factorization.

690501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 690501 is about 830.9638981328. The cubic root of 690501 is about 88.3869410765.

Adding to 690501 its reverse (105096), we get a palindrome (795597).

The spelling of 690501 in words is "six hundred ninety thousand, five hundred one".