72094909 has 8 divisors (see below), whose sum is σ = 76656888. Its totient is φ = 67568640.

The previous prime is 72094901. The next prime is 72094921. The reversal of 72094909 is 90949027.

It can be written as a sum of positive squares in 4 ways, for example, as 8940100 + 63154809 = 2990^2 + 7947^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72094909 - 2³ = 72094901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72094901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4702 + ... + 12895.

It is an arithmetic number, because the mean of its divisors is an integer number (9582111).

Almost surely, 2^72094909 is an apocalyptic number.

It is an amenable number.

72094909 is a deficient number, since it is larger than the sum of its proper divisors (4561979).

72094909 is a wasteful number, since it uses less digits than its factorization.

72094909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17855.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 72094909 is about 8490.8720989072. The cubic root of 72094909 is about 416.1994794201.

The spelling of 72094909 in words is "seventy-two million, ninety-four thousand, nine hundred nine".