1670719091 has 2 divisors, whose sum is σ = 1670719092. Its totient is φ = 1670719090.

The previous prime is 1670719069. The next prime is 1670719093. The reversal of 1670719091 is 1909170761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1670719091 - 2¹⁰ = 1670718067 is a prime.

Together with 1670719093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1670719093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835359545 + 835359546.

It is an arithmetic number, because the mean of its divisors is an integer number (835359546).

Almost surely, 2^1670719091 is an apocalyptic number.

1670719091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670719091 is an equidigital number, since it uses as much as digits as its factorization.

1670719091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 41.

The square root of 1670719091 is about 40874.4307727949. The cubic root of 1670719091 is about 1186.5912597881.

The spelling of 1670719091 in words is "one billion, six hundred seventy million, seven hundred nineteen thousand, ninety-one".