672870091 has 2 divisors, whose sum is σ = 672870092. Its totient is φ = 672870090.

The previous prime is 672870089. The next prime is 672870109. The reversal of 672870091 is 190078276.

672870091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (672870109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 672870091 - 2¹ = 672870089 is a prime.

Together with 672870089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (672870061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336435045 + 336435046.

It is an arithmetic number, because the mean of its divisors is an integer number (336435046).

Almost surely, 2^672870091 is an apocalyptic number.

672870091 is a deficient number, since it is larger than the sum of its proper divisors (1).

672870091 is an equidigital number, since it uses as much as digits as its factorization.

672870091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 672870091 is about 25939.7396093330. The cubic root of 672870091 is about 876.2816986870.

The spelling of 672870091 in words is "six hundred seventy-two million, eight hundred seventy thousand, ninety-one".