78898237 has 4 divisors (see below), whose sum is σ = 86070816. Its totient is φ = 71725660.

The previous prime is 78898217. The next prime is 78898243. The reversal of 78898237 is 73289887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73289887 = 11 ⋅6662717.

It is a cyclic number.

It is not a de Polignac number, because 78898237 - 2¹⁵ = 78865469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78898217) 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, 3586273 + ... + 3586294.

It is an arithmetic number, because the mean of its divisors is an integer number (21517704).

Almost surely, 2^78898237 is an apocalyptic number.

It is an amenable number.

78898237 is a deficient number, since it is larger than the sum of its proper divisors (7172579).

78898237 is a wasteful number, since it uses less digits than its factorization.

78898237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7172578.

The product of its digits is 1354752, while the sum is 52.

The square root of 78898237 is about 8882.4679565985. The cubic root of 78898237 is about 428.8997235394.

The spelling of 78898237 in words is "seventy-eight million, eight hundred ninety-eight thousand, two hundred thirty-seven".