90867919 has 2 divisors, whose sum is σ = 90867920. Its totient is φ = 90867918.

The previous prime is 90867841. The next prime is 90867923. The reversal of 90867919 is 91976809.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90867919 - 2¹⁷ = 90736847 is a prime.

It is a super-2 number, since 2×90867919² = 16513957406781122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90867949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45433959 + 45433960.

It is an arithmetic number, because the mean of its divisors is an integer number (45433960).

Almost surely, 2^90867919 is an apocalyptic number.

90867919 is a deficient number, since it is larger than the sum of its proper divisors (1).

90867919 is an equidigital number, since it uses as much as digits as its factorization.

90867919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 90867919 is about 9532.4665748168. The cubic root of 90867919 is about 449.5764228184.

The spelling of 90867919 in words is "ninety million, eight hundred sixty-seven thousand, nine hundred nineteen".