72094921 has 2 divisors, whose sum is σ = 72094922. Its totient is φ = 72094920.

The previous prime is 72094901. The next prime is 72094927. The reversal of 72094921 is 12949027.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71639296 + 455625 = 8464^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 72094921 - 2⁷ = 72094793 is a prime.

It is not a weakly prime, because it can be changed into another prime (72094927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36047460 + 36047461.

It is an arithmetic number, because the mean of its divisors is an integer number (36047461).

Almost surely, 2^72094921 is an apocalyptic number.

It is an amenable number.

72094921 is a deficient number, since it is larger than the sum of its proper divisors (1).

72094921 is an equidigital number, since it uses as much as digits as its factorization.

72094921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 72094921 is about 8490.8728055483. The cubic root of 72094921 is about 416.1995025119.

The spelling of 72094921 in words is "seventy-two million, ninety-four thousand, nine hundred twenty-one".