73486139 has 2 divisors, whose sum is σ = 73486140. Its totient is φ = 73486138.

The previous prime is 73486117. The next prime is 73486141. The reversal of 73486139 is 93168437.

It is a strong prime.

It is an emirp because it is prime and its reverse (93168437) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73486139 is a prime.

It is a Sophie Germain prime.

Together with 73486141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 73486096 and 73486105.

It is not a weakly prime, because it can be changed into another prime (73486159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36743069 + 36743070.

It is an arithmetic number, because the mean of its divisors is an integer number (36743070).

Almost surely, 2^73486139 is an apocalyptic number.

73486139 is a deficient number, since it is larger than the sum of its proper divisors (1).

73486139 is an equidigital number, since it uses as much as digits as its factorization.

73486139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 73486139 is about 8572.4056716887. The cubic root of 73486139 is about 418.8596028837.

The spelling of 73486139 in words is "seventy-three million, four hundred eighty-six thousand, one hundred thirty-nine".