78837881 has 4 divisors (see below), whose sum is σ = 79405200. Its totient is φ = 78270564.

The previous prime is 78837853. The next prime is 78837887. The reversal of 78837881 is 18873887.

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.

It is a cyclic number.

It is not a de Polignac number, because 78837881 - 2¹⁸ = 78575737 is a prime.

It is a super-2 number, since 2×78837881² = 12430822961140322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (78837887) 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, 283451 + ... + 283728.

It is an arithmetic number, because the mean of its divisors is an integer number (19851300).

Almost surely, 2^78837881 is an apocalyptic number.

It is an amenable number.

78837881 is a deficient number, since it is larger than the sum of its proper divisors (567319).

78837881 is a wasteful number, since it uses less digits than its factorization.

78837881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567318.

The product of its digits is 602112, while the sum is 50.

The square root of 78837881 is about 8879.0698274087. The cubic root of 78837881 is about 428.7903282961.

The spelling of 78837881 in words is "seventy-eight million, eight hundred thirty-seven thousand, eight hundred eighty-one".