73720837 has 4 divisors (see below), whose sum is σ = 74821216. Its totient is φ = 72620460.

The previous prime is 73720811. The next prime is 73720841. The reversal of 73720837 is 73802737.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73802737 = 47 ⋅1570271.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73720837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73720796 and 73720805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73720637) 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, 550089 + ... + 550222.

It is an arithmetic number, because the mean of its divisors is an integer number (18705304).

Almost surely, 2^73720837 is an apocalyptic number.

It is an amenable number.

73720837 is a deficient number, since it is larger than the sum of its proper divisors (1100379).

73720837 is a wasteful number, since it uses less digits than its factorization.

73720837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100378.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 73720837 is about 8586.0839152666. The cubic root of 73720837 is about 419.3050430831.

The spelling of 73720837 in words is "seventy-three million, seven hundred twenty thousand, eight hundred thirty-seven".