97578994 has 4 divisors (see below), whose sum is σ = 146368494. Its totient is φ = 48789496.

The previous prime is 97578991. The next prime is 97579021. The reversal of 97578994 is 49987579.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 62331025 + 35247969 = 7895^2 + 5937^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (97578991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24394747 + ... + 24394750.

Almost surely, 2^97578994 is an apocalyptic number.

97578994 is a deficient number, since it is larger than the sum of its proper divisors (48789500).

97578994 is a wasteful number, since it uses less digits than its factorization.

97578994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48789499.

The product of its digits is 5715360, while the sum is 58.

The square root of 97578994 is about 9878.2080358737. The cubic root of 97578994 is about 460.3824701842.

The spelling of 97578994 in words is "ninety-seven million, five hundred seventy-eight thousand, nine hundred ninety-four".