1673265091 has 2 divisors, whose sum is σ = 1673265092. Its totient is φ = 1673265090.

The previous prime is 1673265089. The next prime is 1673265101. The reversal of 1673265091 is 1905623761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1673265091 - 2¹ = 1673265089 is a prime.

Together with 1673265089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1673265791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836632545 + 836632546.

It is an arithmetic number, because the mean of its divisors is an integer number (836632546).

Almost surely, 2^1673265091 is an apocalyptic number.

1673265091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1673265091 is an equidigital number, since it uses as much as digits as its factorization.

1673265091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 1673265091 is about 40905.5630813218. The cubic root of 1673265091 is about 1187.1937005911.

The spelling of 1673265091 in words is "one billion, six hundred seventy-three million, two hundred sixty-five thousand, ninety-one".