90861869 has 8 divisors (see below), whose sum is σ = 104182848. Its totient is φ = 77626080.

The previous prime is 90861851. The next prime is 90861877. The reversal of 90861869 is 96816809.

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

It is not a de Polignac number, because 90861869 - 2¹² = 90857773 is a prime.

It is a super-2 number, since 2×90861869² = 16511758476346322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90864869) 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, 18992 + ... + 23289.

It is an arithmetic number, because the mean of its divisors is an integer number (13022856).

Almost surely, 2^90861869 is an apocalyptic number.

It is an amenable number.

90861869 is a deficient number, since it is larger than the sum of its proper divisors (13320979).

90861869 is a wasteful number, since it uses less digits than its factorization.

90861869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42595.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 90861869 is about 9532.1492329904. The cubic root of 90861869 is about 449.5664449746.

The spelling of 90861869 in words is "ninety million, eight hundred sixty-one thousand, eight hundred sixty-nine".