90019379 has 2 divisors, whose sum is σ = 90019380. Its totient is φ = 90019378.

The previous prime is 90019361. The next prime is 90019411. The reversal of 90019379 is 97391009.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90019379 is a prime.

It is a super-3 number, since 3×90019379³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (90010379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45009689 + 45009690.

It is an arithmetic number, because the mean of its divisors is an integer number (45009690).

Almost surely, 2^90019379 is an apocalyptic number.

90019379 is a deficient number, since it is larger than the sum of its proper divisors (1).

90019379 is an equidigital number, since it uses as much as digits as its factorization.

90019379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 90019379 is about 9487.8542885101. The cubic root of 90019379 is about 448.1726372150.

The spelling of 90019379 in words is "ninety million, nineteen thousand, three hundred seventy-nine".