73121019 has 8 divisors (see below), whose sum is σ = 97677072. Its totient is φ = 48656160.

The previous prime is 73121017. The next prime is 73121021. The reversal of 73121019 is 91012137.

It is an interprime number because it is at equal distance from previous prime (73121017) and next prime (73121021).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73121019 - 2¹ = 73121017 is a prime.

It is a super-2 number, since 2×73121019² = 10693366839196722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73121019.

It is not an unprimeable number, because it can be changed into a prime (73121017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20904 + ... + 24149.

It is an arithmetic number, because the mean of its divisors is an integer number (12209634).

Almost surely, 2^73121019 is an apocalyptic number.

73121019 is a deficient number, since it is larger than the sum of its proper divisors (24556053).

73121019 is a wasteful number, since it uses less digits than its factorization.

73121019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45597.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 73121019 is about 8551.0829138770. The cubic root of 73121019 is about 418.1647416539.

The spelling of 73121019 in words is "seventy-three million, one hundred twenty-one thousand, nineteen".