90018970 has 8 divisors (see below), whose sum is σ = 162034164. Its totient is φ = 36007584.

The previous prime is 90018937. The next prime is 90018991. The reversal of 90018970 is 7981009.

It can be written as a sum of positive squares in 2 ways, for example, as 81486729 + 8532241 = 9027^2 + 2921^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4500939 + ... + 4500958.

Almost surely, 2^90018970 is an apocalyptic number.

90018970 is a deficient number, since it is larger than the sum of its proper divisors (72015194).

90018970 is a wasteful number, since it uses less digits than its factorization.

90018970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9001904.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 90018970 is about 9487.8327346133. The cubic root of 90018970 is about 448.1719584616.

Adding to 90018970 its reverse (7981009), we get a palindrome (97999979).

It can be divided in two parts, 9001 and 8970, that added together give a palindrome (17971).

The spelling of 90018970 in words is "ninety million, eighteen thousand, nine hundred seventy".