97790218 has 8 divisors (see below), whose sum is σ = 147157920. Its totient is φ = 48737580.

The previous prime is 97790179. The next prime is 97790219. The reversal of 97790218 is 81209779.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (97790219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77988 + ... + 79231.

It is an arithmetic number, because the mean of its divisors is an integer number (18394740).

Almost surely, 2^97790218 is an apocalyptic number.

97790218 is a deficient number, since it is larger than the sum of its proper divisors (49367702).

97790218 is a wasteful number, since it uses less digits than its factorization.

97790218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157532.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 97790218 is about 9888.8936691624. The cubic root of 97790218 is about 460.7144191723.

The spelling of 97790218 in words is "ninety-seven million, seven hundred ninety thousand, two hundred eighteen".