72273013 has 2 divisors, whose sum is σ = 72273014. Its totient is φ = 72273012.

The previous prime is 72273007. The next prime is 72273023. The reversal of 72273013 is 31037227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40666129 + 31606884 = 6377^2 + 5622^2 .

It is a cyclic number.

It is not a de Polignac number, because 72273013 - 2¹³ = 72264821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72273023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36136506 + 36136507.

It is an arithmetic number, because the mean of its divisors is an integer number (36136507).

Almost surely, 2^72273013 is an apocalyptic number.

It is an amenable number.

72273013 is a deficient number, since it is larger than the sum of its proper divisors (1).

72273013 is an equidigital number, since it uses as much as digits as its factorization.

72273013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 72273013 is about 8501.3535981042. The cubic root of 72273013 is about 416.5419253966.

The spelling of 72273013 in words is "seventy-two million, two hundred seventy-three thousand, thirteen".