73142791 has 4 divisors (see below), whose sum is σ = 73287000. Its totient is φ = 72998584.

The previous prime is 73142767. The next prime is 73142807. The reversal of 73142791 is 19724137.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73142791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73142711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71341 + ... + 72358.

It is an arithmetic number, because the mean of its divisors is an integer number (18321750).

Almost surely, 2^73142791 is an apocalyptic number.

73142791 is a deficient number, since it is larger than the sum of its proper divisors (144209).

73142791 is a wasteful number, since it uses less digits than its factorization.

73142791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144208.

The product of its digits is 10584, while the sum is 34.

The square root of 73142791 is about 8552.3558742606. The cubic root of 73142791 is about 418.2062407988.

The spelling of 73142791 in words is "seventy-three million, one hundred forty-two thousand, seven hundred ninety-one".