97218490 has 8 divisors (see below), whose sum is σ = 174993300. Its totient is φ = 38887392.

The previous prime is 97218463. The next prime is 97218509. The reversal of 97218490 is 9481279.

It can be written as a sum of positive squares in 2 ways, for example, as 96294969 + 923521 = 9813^2 + 961^2 .

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, 4860915 + ... + 4860934.

Almost surely, 2^97218490 is an apocalyptic number.

97218490 is a deficient number, since it is larger than the sum of its proper divisors (77774810).

97218490 is a wasteful number, since it uses less digits than its factorization.

97218490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9721856.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 97218490 is about 9859.9437118069. The cubic root of 97218490 is about 459.8148120350.

The spelling of 97218490 in words is "ninety-seven million, two hundred eighteen thousand, four hundred ninety".