671248091 has 2 divisors, whose sum is σ = 671248092. Its totient is φ = 671248090.

The previous prime is 671248003. The next prime is 671248159. The reversal of 671248091 is 190842176.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671248091 - 2²² = 667053787 is a prime.

It is a super-2 number, since 2×671248091² = 901147999342288562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (671241091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335624045 + 335624046.

It is an arithmetic number, because the mean of its divisors is an integer number (335624046).

Almost surely, 2^671248091 is an apocalyptic number.

671248091 is a deficient number, since it is larger than the sum of its proper divisors (1).

671248091 is an equidigital number, since it uses as much as digits as its factorization.

671248091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 671248091 is about 25908.4559748357. The cubic root of 671248091 is about 875.5770195635.

The spelling of 671248091 in words is "six hundred seventy-one million, two hundred forty-eight thousand, ninety-one".