90671861 has 8 divisors (see below), whose sum is σ = 103714944. Its totient is φ = 77651280.

The previous prime is 90671851. The next prime is 90671873. The reversal of 90671861 is 16817609.

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

It is a de Polignac number, because none of the positive numbers 2^k-90671861 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 (90671831) 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, 4151 + ... + 14091.

It is an arithmetic number, because the mean of its divisors is an integer number (12964368).

Almost surely, 2^90671861 is an apocalyptic number.

It is an amenable number.

90671861 is a deficient number, since it is larger than the sum of its proper divisors (13043083).

90671861 is a wasteful number, since it uses less digits than its factorization.

90671861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11251.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 90671861 is about 9522.1773245409. The cubic root of 90671861 is about 449.2528523574.

The spelling of 90671861 in words is "ninety million, six hundred seventy-one thousand, eight hundred sixty-one".