90878503 has 4 divisors (see below), whose sum is σ = 92123488. Its totient is φ = 89633520.

The previous prime is 90878477. The next prime is 90878507. The reversal of 90878503 is 30587809.

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

It is a cyclic number.

It is not a de Polignac number, because 90878503 - 2¹⁷ = 90747431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90878507) 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, 622383 + ... + 622528.

It is an arithmetic number, because the mean of its divisors is an integer number (23030872).

Almost surely, 2^90878503 is an apocalyptic number.

90878503 is a deficient number, since it is larger than the sum of its proper divisors (1244985).

90878503 is a wasteful number, since it uses less digits than its factorization.

90878503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244984.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 90878503 is about 9533.0217140212. The cubic root of 90878503 is about 449.5938772078.

The spelling of 90878503 in words is "ninety million, eight hundred seventy-eight thousand, five hundred three".