78541983 has 12 divisors (see below), whose sum is σ = 122176600. Its totient is φ = 48333456.

The previous prime is 78541979. The next prime is 78541993. The reversal of 78541983 is 38914587.

It is not a de Polignac number, because 78541983 - 2² = 78541979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78541933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335533 + ... + 335766.

Almost surely, 2^78541983 is an apocalyptic number.

78541983 is a deficient number, since it is larger than the sum of its proper divisors (43634617).

78541983 is a wasteful number, since it uses less digits than its factorization.

78541983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671318 (or 671315 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 78541983 is about 8862.3914943992. The cubic root of 78541983 is about 428.2532038164.

It can be divided in two parts, 78541 and 983, that added together give a square (79524 = 282²).

The spelling of 78541983 in words is "seventy-eight million, five hundred forty-one thousand, nine hundred eighty-three".