90747 has 8 divisors (see below), whose sum is σ = 134480. Its totient is φ = 60480.

The previous prime is 90731. The next prime is 90749. The reversal of 90747 is 74709.

It is not a de Polignac number, because 90747 - 2⁴ = 90731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3361 = 90747 / (9 + 0 + 7 + 4 + 7).

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90747.

It is not an unprimeable number, because it can be changed into a prime (90749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1654 + ... + 1707.

It is an arithmetic number, because the mean of its divisors is an integer number (16810).

2⁹⁰⁷⁴⁷ is an apocalyptic number.

90747 is a deficient number, since it is larger than the sum of its proper divisors (43733).

90747 is a wasteful number, since it uses less digits than its factorization.

90747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3370 (or 3364 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 90747 is about 301.2424272907. The cubic root of 90747 is about 44.9376915433.

The spelling of 90747 in words is "ninety thousand, seven hundred forty-seven".