73903905 has 12 divisors (see below), whose sum is σ = 128100180. Its totient is φ = 39415392.

The previous prime is 73903903. The next prime is 73903927. The reversal of 73903905 is 50930937.

It can be written as a sum of positive squares in 2 ways, for example, as 54508689 + 19395216 = 7383^2 + 4404^2 .

It is not a de Polignac number, because 73903905 - 2¹ = 73903903 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 73903905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73903903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 821110 + ... + 821199.

It is an arithmetic number, because the mean of its divisors is an integer number (10675015).

Almost surely, 2^73903905 is an apocalyptic number.

It is an amenable number.

73903905 is a deficient number, since it is larger than the sum of its proper divisors (54196275).

73903905 is a wasteful number, since it uses less digits than its factorization.

73903905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642320 (or 1642317 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 36.

The square root of 73903905 is about 8596.7380441654. The cubic root of 73903905 is about 419.6518373176.

The spelling of 73903905 in words is "seventy-three million, nine hundred three thousand, nine hundred five".