690347 has 4 divisors (see below), whose sum is σ = 788976. Its totient is φ = 591720.

The previous prime is 690341. The next prime is 690367. The reversal of 690347 is 743096.

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-690347 is a prime.

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

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (690341) 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, 49304 + ... + 49317.

It is an arithmetic number, because the mean of its divisors is an integer number (197244).

2⁶⁹⁰³⁴⁷ is an apocalyptic number.

690347 is a deficient number, since it is larger than the sum of its proper divisors (98629).

690347 is an equidigital number, since it uses as much as digits as its factorization.

690347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98628.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 690347 is about 830.8712294935. The cubic root of 690347 is about 88.3803697121.

The spelling of 690347 in words is "six hundred ninety thousand, three hundred forty-seven".