90216019 has 2 divisors, whose sum is σ = 90216020. Its totient is φ = 90216018.

The previous prime is 90216001. The next prime is 90216037. The reversal of 90216019 is 91061209.

It is a balanced prime because it is at equal distance from previous prime (90216001) and next prime (90216037).

It is a cyclic number.

It is not a de Polignac number, because 90216019 - 2⁵ = 90215987 is a prime.

It is a super-2 number, since 2×90216019² = 16277860168416722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90216319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45108009 + 45108010.

It is an arithmetic number, because the mean of its divisors is an integer number (45108010).

Almost surely, 2^90216019 is an apocalyptic number.

90216019 is a deficient number, since it is larger than the sum of its proper divisors (1).

90216019 is an equidigital number, since it uses as much as digits as its factorization.

90216019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 90216019 is about 9498.2113579347. The cubic root of 90216019 is about 448.4987320928.

The spelling of 90216019 in words is "ninety million, two hundred sixteen thousand, nineteen".