73991541 has 8 divisors (see below), whose sum is σ = 106244320. Its totient is φ = 45533232.

The previous prime is 73991539. The next prime is 73991549. The reversal of 73991541 is 14519937.

It is a happy number.

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

It is not a de Polignac number, because 73991541 - 2¹ = 73991539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1897219 = 73991541 / (7 + 3 + 9 + 9 + 1 + 5 + 4 + 1).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73991541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73991549) 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, 948571 + ... + 948648.

It is an arithmetic number, because the mean of its divisors is an integer number (13280540).

Almost surely, 2^73991541 is an apocalyptic number.

It is an amenable number.

73991541 is a deficient number, since it is larger than the sum of its proper divisors (32252779).

73991541 is a wasteful number, since it uses less digits than its factorization.

73991541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897235.

The product of its digits is 34020, while the sum is 39.

The square root of 73991541 is about 8601.8335836030. The cubic root of 73991541 is about 419.8176475964.

The spelling of 73991541 in words is "seventy-three million, nine hundred ninety-one thousand, five hundred forty-one".