90745847 has 4 divisors (see below), whose sum is σ = 96083856. Its totient is φ = 85407840.

The previous prime is 90745841. The next prime is 90745871. The reversal of 90745847 is 74854709.

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 90745847 - 2¹² = 90741751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90745798 and 90745807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90745841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2668979 + ... + 2669012.

It is an arithmetic number, because the mean of its divisors is an integer number (24020964).

Almost surely, 2^90745847 is an apocalyptic number.

90745847 is a deficient number, since it is larger than the sum of its proper divisors (5338009).

90745847 is a wasteful number, since it uses less digits than its factorization.

90745847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5338008.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 90745847 is about 9526.0614631651. The cubic root of 90745847 is about 449.3750122156.

The spelling of 90745847 in words is "ninety million, seven hundred forty-five thousand, eight hundred forty-seven".