690971 has 4 divisors (see below), whose sum is σ = 701352. Its totient is φ = 680592.

The previous prime is 690953. The next prime is 690997. The reversal of 690971 is 179096.

690971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690971 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690971.

It is not an unprimeable number, because it can be changed into a prime (690271) 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, 5090 + ... + 5223.

It is an arithmetic number, because the mean of its divisors is an integer number (175338).

2⁶⁹⁰⁹⁷¹ is an apocalyptic number.

690971 is a deficient number, since it is larger than the sum of its proper divisors (10381).

690971 is a wasteful number, since it uses less digits than its factorization.

690971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10380.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 690971 is about 831.2466541286. The cubic root of 690971 is about 88.4069904998.

It can be divided in two parts, 690 and 971, that added together give a palindrome (1661).

The spelling of 690971 in words is "six hundred ninety thousand, nine hundred seventy-one".