78897033 has 6 divisors (see below), whose sum is σ = 113962394. Its totient is φ = 52598016.

The previous prime is 78897031. The next prime is 78897037. The reversal of 78897033 is 33079887.

It can be written as a sum of positive squares in only one way, i.e., 50509449 + 28387584 = 7107^2 + 5328^2 .

It is not a de Polignac number, because 78897033 - 2¹ = 78897031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78897033.

It is not an unprimeable number, because it can be changed into a prime (78897031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4383160 + ... + 4383177.

Almost surely, 2^78897033 is an apocalyptic number.

It is an amenable number.

78897033 is a deficient number, since it is larger than the sum of its proper divisors (35065361).

78897033 is a wasteful number, since it uses less digits than its factorization.

78897033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8766343 (or 8766340 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 78897033 is about 8882.4001823831. The cubic root of 78897033 is about 428.8975418350.

The spelling of 78897033 in words is "seventy-eight million, eight hundred ninety-seven thousand, thirty-three".