78837673 has 2 divisors, whose sum is σ = 78837674. Its totient is φ = 78837672.

The previous prime is 78837667. The next prime is 78837677. The reversal of 78837673 is 37673887.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78641424 + 196249 = 8868^2 + 443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78837673 is a prime.

It is not a weakly prime, because it can be changed into another prime (78837677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39418836 + 39418837.

It is an arithmetic number, because the mean of its divisors is an integer number (39418837).

Almost surely, 2^78837673 is an apocalyptic number.

It is an amenable number.

78837673 is a deficient number, since it is larger than the sum of its proper divisors (1).

78837673 is an equidigital number, since it uses as much as digits as its factorization.

78837673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 49.

The square root of 78837673 is about 8879.0581144624. The cubic root of 78837673 is about 428.7899511996.

The spelling of 78837673 in words is "seventy-eight million, eight hundred thirty-seven thousand, six hundred seventy-three".