73870019 has 4 divisors (see below), whose sum is σ = 75866544. Its totient is φ = 71873496.

The previous prime is 73870009. The next prime is 73870031. The reversal of 73870019 is 91007837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91007837 = 53 ⋅1717129.

It is a cyclic number.

It is not a de Polignac number, because 73870019 - 2¹² = 73865923 is a prime.

It is a super-2 number, since 2×73870019² = 10913559414120722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73870009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998207 + ... + 998280.

It is an arithmetic number, because the mean of its divisors is an integer number (18966636).

Almost surely, 2^73870019 is an apocalyptic number.

73870019 is a deficient number, since it is larger than the sum of its proper divisors (1996525).

73870019 is a wasteful number, since it uses less digits than its factorization.

73870019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996524.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 73870019 is about 8594.7669543740. The cubic root of 73870019 is about 419.5876887176.

The spelling of 73870019 in words is "seventy-three million, eight hundred seventy thousand, nineteen".