90814919 has 4 divisors (see below), whose sum is σ = 97800696. Its totient is φ = 83829144.

The previous prime is 90814907. The next prime is 90814937. The reversal of 90814919 is 91941809.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90814919 is a prime.

It is a super-2 number, since 2×90814919² = 16494699025953122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90814219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3492869 + ... + 3492894.

It is an arithmetic number, because the mean of its divisors is an integer number (24450174).

Almost surely, 2^90814919 is an apocalyptic number.

90814919 is a deficient number, since it is larger than the sum of its proper divisors (6985777).

90814919 is a wasteful number, since it uses less digits than its factorization.

90814919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6985776.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 90814919 is about 9529.6861963026. The cubic root of 90814919 is about 449.4889985483.

The spelling of 90814919 in words is "ninety million, eight hundred fourteen thousand, nine hundred nineteen".