90662891 has 4 divisors (see below), whose sum is σ = 98904984. Its totient is φ = 82420800.

The previous prime is 90662837. The next prime is 90662909. The reversal of 90662891 is 19826609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19826609 = 11 ⋅1802419.

It is not a de Polignac number, because 90662891 - 2⁶ = 90662827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90662191) 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, 4121030 + ... + 4121051.

It is an arithmetic number, because the mean of its divisors is an integer number (24726246).

Almost surely, 2^90662891 is an apocalyptic number.

90662891 is a deficient number, since it is larger than the sum of its proper divisors (8242093).

90662891 is a wasteful number, since it uses less digits than its factorization.

90662891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8242092.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 90662891 is about 9521.7063071699. The cubic root of 90662891 is about 449.2380372834.

The spelling of 90662891 in words is "ninety million, six hundred sixty-two thousand, eight hundred ninety-one".