672196891 has 2 divisors, whose sum is σ = 672196892. Its totient is φ = 672196890.

The previous prime is 672196883. The next prime is 672196897. The reversal of 672196891 is 198691276.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 672196891 - 2³ = 672196883 is a prime.

It is not a weakly prime, because it can be changed into another prime (672196897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336098445 + 336098446.

It is an arithmetic number, because the mean of its divisors is an integer number (336098446).

Almost surely, 2^672196891 is an apocalyptic number.

672196891 is a deficient number, since it is larger than the sum of its proper divisors (1).

672196891 is an equidigital number, since it uses as much as digits as its factorization.

672196891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 672196891 is about 25926.7601331134. The cubic root of 672196891 is about 875.9893640591.

The spelling of 672196891 in words is "six hundred seventy-two million, one hundred ninety-six thousand, eight hundred ninety-one".