690371 has 4 divisors (see below), whose sum is σ = 753144. Its totient is φ = 627600.

The previous prime is 690367. The next prime is 690377. The reversal of 690371 is 173096.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 690371 - 2² = 690367 is a prime.

It is a super-2 number, since 2×690371² = 953224235282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 690371.

It is not an unprimeable number, because it can be changed into a prime (690377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31370 + ... + 31391.

It is an arithmetic number, because the mean of its divisors is an integer number (188286).

2⁶⁹⁰³⁷¹ is an apocalyptic number.

690371 is a deficient number, since it is larger than the sum of its proper divisors (62773).

690371 is a wasteful number, since it uses less digits than its factorization.

690371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62772.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 690371 is about 830.8856720392. The cubic root of 690371 is about 88.3813938852.

The spelling of 690371 in words is "six hundred ninety thousand, three hundred seventy-one".