801990619 has 2 divisors, whose sum is σ = 801990620. Its totient is φ = 801990618.

The previous prime is 801990617. The next prime is 801990641. The reversal of 801990619 is 916099108.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 801990619 - 2¹ = 801990617 is a prime.

It is a super-2 number, since 2×801990619² = 1286377905928006322, which contains 22 as substring.

Together with 801990617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (801990617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400995309 + 400995310.

It is an arithmetic number, because the mean of its divisors is an integer number (400995310).

Almost surely, 2^801990619 is an apocalyptic number.

801990619 is a deficient number, since it is larger than the sum of its proper divisors (1).

801990619 is an equidigital number, since it uses as much as digits as its factorization.

801990619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 801990619 is about 28319.4388892153. The cubic root of 801990619 is about 929.0870985491.

The spelling of 801990619 in words is "eight hundred one million, nine hundred ninety thousand, six hundred nineteen".