97278890 has 8 divisors (see below), whose sum is σ = 175102020. Its totient is φ = 38911552.

The previous prime is 97278887. The next prime is 97278893. The reversal of 97278890 is 9887279.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (97278887) and next prime (97278893).

It can be written as a sum of positive squares in 2 ways, for example, as 97278769 + 121 = 9863^2 + 11^2 .

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 (97278893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4863935 + ... + 4863954.

Almost surely, 2^97278890 is an apocalyptic number.

97278890 is a deficient number, since it is larger than the sum of its proper divisors (77823130).

97278890 is a wasteful number, since it uses less digits than its factorization.

97278890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9727896.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 97278890 is about 9863.0061340344. The cubic root of 97278890 is about 459.9100170557.

The spelling of 97278890 in words is "ninety-seven million, two hundred seventy-eight thousand, eight hundred ninety".