73561837 has 4 divisors (see below), whose sum is σ = 73713376. Its totient is φ = 73410300.

The previous prime is 73561819. The next prime is 73561841. The reversal of 73561837 is 73816537.

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: 73816537 = 149 ⋅495413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73561837 is a prime.

It is a super-2 number, since 2×73561837² = 10822687725629138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73561837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73561897) 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, 75039 + ... + 76012.

It is an arithmetic number, because the mean of its divisors is an integer number (18428344).

Almost surely, 2^73561837 is an apocalyptic number.

It is an amenable number.

73561837 is a deficient number, since it is larger than the sum of its proper divisors (151539).

73561837 is a wasteful number, since it uses less digits than its factorization.

73561837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151538.

The product of its digits is 105840, while the sum is 40.

The square root of 73561837 is about 8576.8197486015. The cubic root of 73561837 is about 419.0033758175.

The spelling of 73561837 in words is "seventy-three million, five hundred sixty-one thousand, eight hundred thirty-seven".