73643057 has 4 divisors (see below), whose sum is σ = 74651940. Its totient is φ = 72634176.

The previous prime is 73643041. The next prime is 73643081. The reversal of 73643057 is 75034637.

It is a happy number.

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 37834801 + 35808256 = 6151^2 + 5984^2 .

It is a cyclic number.

It is not a de Polignac number, because 73643057 - 2⁴ = 73643041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73643027) 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, 504332 + ... + 504477.

It is an arithmetic number, because the mean of its divisors is an integer number (18662985).

Almost surely, 2^73643057 is an apocalyptic number.

It is an amenable number.

73643057 is a deficient number, since it is larger than the sum of its proper divisors (1008883).

73643057 is a wasteful number, since it uses less digits than its factorization.

73643057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008882.

The product of its (nonzero) digits is 52920, while the sum is 35.

The square root of 73643057 is about 8581.5532976263. The cubic root of 73643057 is about 419.1575270209.

The spelling of 73643057 in words is "seventy-three million, six hundred forty-three thousand, fifty-seven".