672869 has 2 divisors, whose sum is σ = 672870. Its totient is φ = 672868.

The previous prime is 672863. The next prime is 672871. The reversal of 672869 is 968276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616225 + 56644 = 785^2 + 238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672869 is a prime.

It is a super-2 number, since 2×672869² = 905505382322, which contains 22 as substring.

Together with 672871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336434 + 336435.

It is an arithmetic number, because the mean of its divisors is an integer number (336435).

2⁶⁷²⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

672869 is a deficient number, since it is larger than the sum of its proper divisors (1).

672869 is an equidigital number, since it uses as much as digits as its factorization.

672869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 672869 is about 820.2859257600. The cubic root of 672869 is about 87.6281225082.

The spelling of 672869 in words is "six hundred seventy-two thousand, eight hundred sixty-nine".