97478281 has 4 divisors (see below), whose sum is σ = 97593412. Its totient is φ = 97363152.

The previous prime is 97478267. The next prime is 97478299. The reversal of 97478281 is 18287479.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18287479 = 7 ⋅2612497.

It can be written as a sum of positive squares in 2 ways, for example, as 29975625 + 67502656 = 5475^2 + 8216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97478281 is a prime.

It is a super-2 number, since 2×97478281² = 19004030533429922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97478681) 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, 56286 + ... + 57991.

It is an arithmetic number, because the mean of its divisors is an integer number (24398353).

Almost surely, 2^97478281 is an apocalyptic number.

It is an amenable number.

97478281 is a deficient number, since it is larger than the sum of its proper divisors (115131).

97478281 is a wasteful number, since it uses less digits than its factorization.

97478281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115130.

The product of its digits is 225792, while the sum is 46.

The square root of 97478281 is about 9873.1089834965. The cubic root of 97478281 is about 460.2240260393.

The spelling of 97478281 in words is "ninety-seven million, four hundred seventy-eight thousand, two hundred eighty-one".