72090803 has 4 divisors (see below), whose sum is σ = 72405840. Its totient is φ = 71775768.

The previous prime is 72090797. The next prime is 72090827. The reversal of 72090803 is 30809027.

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 72090803 - 2²⁰ = 71042227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72090853) 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, 157175 + ... + 157632.

It is an arithmetic number, because the mean of its divisors is an integer number (18101460).

Almost surely, 2^72090803 is an apocalyptic number.

72090803 is a deficient number, since it is larger than the sum of its proper divisors (315037).

72090803 is a wasteful number, since it uses less digits than its factorization.

72090803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315036.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 72090803 is about 8490.6303064025. The cubic root of 72090803 is about 416.1915780416.

The spelling of 72090803 in words is "seventy-two million, ninety thousand, eight hundred three".