72062909 has 4 divisors (see below), whose sum is σ = 72110016. Its totient is φ = 72015804.

The previous prime is 72062873. The next prime is 72062911. The reversal of 72062909 is 90926027.

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: 90926027 = 389 ⋅233743.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72062909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72062209) 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, 21179 + ... + 24344.

It is an arithmetic number, because the mean of its divisors is an integer number (18027504).

Almost surely, 2^72062909 is an apocalyptic number.

It is an amenable number.

72062909 is a deficient number, since it is larger than the sum of its proper divisors (47107).

72062909 is a wasteful number, since it uses less digits than its factorization.

72062909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47106.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 72062909 is about 8488.9875132433. The cubic root of 72062909 is about 416.1378922960.

The spelling of 72062909 in words is "seventy-two million, sixty-two thousand, nine hundred nine".