73402643 has 4 divisors (see below), whose sum is σ = 77265960. Its totient is φ = 69539328.

The previous prime is 73402633. The next prime is 73402657. The reversal of 73402643 is 34620437.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 73402643 - 2¹⁰ = 73401619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73402633) 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, 1931630 + ... + 1931667.

It is an arithmetic number, because the mean of its divisors is an integer number (19316490).

Almost surely, 2^73402643 is an apocalyptic number.

73402643 is a deficient number, since it is larger than the sum of its proper divisors (3863317).

73402643 is a wasteful number, since it uses less digits than its factorization.

73402643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3863316.

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 73402643 is about 8567.5342427095. The cubic root of 73402643 is about 418.7009046771.

The spelling of 73402643 in words is "seventy-three million, four hundred two thousand, six hundred forty-three".