78483131 has 2 divisors, whose sum is σ = 78483132. Its totient is φ = 78483130.

The previous prime is 78483121. The next prime is 78483151. The reversal of 78483131 is 13138487.

It is a weak prime.

It is an emirp because it is prime and its reverse (13138487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78483131 - 2²⁶ = 11374267 is a prime.

It is a super-2 number, since 2×78483131² = 12319203703126322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78483091 and 78483100.

It is not a weakly prime, because it can be changed into another prime (78483121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39241565 + 39241566.

It is an arithmetic number, because the mean of its divisors is an integer number (39241566).

Almost surely, 2^78483131 is an apocalyptic number.

78483131 is a deficient number, since it is larger than the sum of its proper divisors (1).

78483131 is an equidigital number, since it uses as much as digits as its factorization.

78483131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 78483131 is about 8859.0705494425. The cubic root of 78483131 is about 428.1462128193.

The spelling of 78483131 in words is "seventy-eight million, four hundred eighty-three thousand, one hundred thirty-one".