73613641 has 4 divisors (see below), whose sum is σ = 74820484. Its totient is φ = 72406800.

The previous prime is 73613633. The next prime is 73613647. The reversal of 73613641 is 14631637.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2042041 + 71571600 = 1429^2 + 8460^2 .

It is a cyclic number.

It is not a de Polignac number, because 73613641 - 2³ = 73613633 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (73613647) 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, 603330 + ... + 603451.

It is an arithmetic number, because the mean of its divisors is an integer number (18705121).

Almost surely, 2^73613641 is an apocalyptic number.

It is an amenable number.

73613641 is a deficient number, since it is larger than the sum of its proper divisors (1206843).

73613641 is a wasteful number, since it uses less digits than its factorization.

73613641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206842.

The product of its digits is 9072, while the sum is 31.

The square root of 73613641 is about 8579.8392176078. The cubic root of 73613641 is about 419.1017101280.

The spelling of 73613641 in words is "seventy-three million, six hundred thirteen thousand, six hundred forty-one".