78921043 has 8 divisors (see below), whose sum is σ = 80212608. Its totient is φ = 77639424.

The previous prime is 78921013. The next prime is 78921047. The reversal of 78921043 is 34012987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78921043 - 2¹³ = 78912851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78921047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14430 + ... + 19132.

It is an arithmetic number, because the mean of its divisors is an integer number (10026576).

Almost surely, 2^78921043 is an apocalyptic number.

78921043 is a deficient number, since it is larger than the sum of its proper divisors (1291565).

78921043 is a wasteful number, since it uses less digits than its factorization.

78921043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4973.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 78921043 is about 8883.7516286758. The cubic root of 78921043 is about 428.9410448885.

The spelling of 78921043 in words is "seventy-eight million, nine hundred twenty-one thousand, forty-three".