90873857 has 8 divisors (see below), whose sum is σ = 96721416. Its totient is φ = 85082112.

The previous prime is 90873829. The next prime is 90873859. The reversal of 90873857 is 75837809.

It can be written as a sum of positive squares in 4 ways, for example, as 414736 + 90459121 = 644^2 + 9511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90873857 - 2⁶ = 90873793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90873859) 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, 10568 + ... + 17129.

It is an arithmetic number, because the mean of its divisors is an integer number (12090177).

Almost surely, 2^90873857 is an apocalyptic number.

It is an amenable number.

90873857 is a deficient number, since it is larger than the sum of its proper divisors (5847559).

90873857 is a wasteful number, since it uses less digits than its factorization.

90873857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27907.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 90873857 is about 9532.7780316128. The cubic root of 90873857 is about 449.5862155178.

The spelling of 90873857 in words is "ninety million, eight hundred seventy-three thousand, eight hundred fifty-seven".