73406993 has 4 divisors (see below), whose sum is σ = 80080368. Its totient is φ = 66733620.

The previous prime is 73406987. The next prime is 73406999. The reversal of 73406993 is 39960437.

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: 39960437 = 11 ⋅3632767.

It is an interprime number because it is at equal distance from previous prime (73406987) and next prime (73406999).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73406993 is a prime.

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 73406993.

It is not an unprimeable number, because it can be changed into a prime (73406999) 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, 3336671 + ... + 3336692.

It is an arithmetic number, because the mean of its divisors is an integer number (20020092).

Almost surely, 2^73406993 is an apocalyptic number.

It is an amenable number.

73406993 is a deficient number, since it is larger than the sum of its proper divisors (6673375).

73406993 is a wasteful number, since it uses less digits than its factorization.

73406993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6673374.

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 73406993 is about 8567.7881042892. The cubic root of 73406993 is about 418.7091755553.

The spelling of 73406993 in words is "seventy-three million, four hundred six thousand, nine hundred ninety-three".