73148139 has 12 divisors (see below), whose sum is σ = 106705872. Its totient is φ = 48282000.

The previous prime is 73148129. The next prime is 73148143. The reversal of 73148139 is 93184137.

It is a happy number.

It is not a de Polignac number, because 73148139 - 2⁷ = 73148011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73148129) 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, 39327 + ... + 41144.

It is an arithmetic number, because the mean of its divisors is an integer number (8892156).

Almost surely, 2^73148139 is an apocalyptic number.

73148139 is a deficient number, since it is larger than the sum of its proper divisors (33557733).

73148139 is a wasteful number, since it uses less digits than its factorization.

73148139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80578 (or 80575 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 73148139 is about 8552.6685309323. The cubic root of 73148139 is about 418.2164332477.

The spelling of 73148139 in words is "seventy-three million, one hundred forty-eight thousand, one hundred thirty-nine".