1445010991 has 2 divisors, whose sum is σ = 1445010992. Its totient is φ = 1445010990.

The previous prime is 1445010989. The next prime is 1445011019. The reversal of 1445010991 is 1990105441.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1445010991 - 2¹ = 1445010989 is a prime.

It is a super-2 number, since 2×1445010991² = 4176113528221604162, which contains 22 as substring.

Together with 1445010989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1445010961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722505495 + 722505496.

It is an arithmetic number, because the mean of its divisors is an integer number (722505496).

Almost surely, 2^1445010991 is an apocalyptic number.

1445010991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445010991 is an equidigital number, since it uses as much as digits as its factorization.

1445010991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 1445010991 is about 38013.3001855929. The cubic root of 1445010991 is about 1130.5515857247.

The spelling of 1445010991 in words is "one billion, four hundred forty-five million, ten thousand, nine hundred ninety-one".