90628493 has 4 divisors (see below), whose sum is σ = 92114268. Its totient is φ = 89142720.

The previous prime is 90628481. The next prime is 90628501. The reversal of 90628493 is 39482609.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48469444 + 42159049 = 6962^2 + 6493^2 .

It is a cyclic number.

It is not a de Polignac number, because 90628493 - 2¹² = 90624397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90628493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90628403) 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, 742796 + ... + 742917.

It is an arithmetic number, because the mean of its divisors is an integer number (23028567).

Almost surely, 2^90628493 is an apocalyptic number.

It is an amenable number.

90628493 is a deficient number, since it is larger than the sum of its proper divisors (1485775).

90628493 is a wasteful number, since it uses less digits than its factorization.

90628493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485774.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 90628493 is about 9519.8998419101. The cubic root of 90628493 is about 449.1812156351.

The spelling of 90628493 in words is "ninety million, six hundred twenty-eight thousand, four hundred ninety-three".