72063613 has 2 divisors, whose sum is σ = 72063614. Its totient is φ = 72063612.

The previous prime is 72063611. The next prime is 72063619. The reversal of 72063613 is 31636027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63313849 + 8749764 = 7957^2 + 2958^2 .

It is a cyclic number.

It is not a de Polignac number, because 72063613 - 2¹ = 72063611 is a prime.

It is a super-2 number, since 2×72063613² = 10386328637227538, which contains 22 as substring.

Together with 72063611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72063611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36031806 + 36031807.

It is an arithmetic number, because the mean of its divisors is an integer number (36031807).

Almost surely, 2^72063613 is an apocalyptic number.

It is an amenable number.

72063613 is a deficient number, since it is larger than the sum of its proper divisors (1).

72063613 is an equidigital number, since it uses as much as digits as its factorization.

72063613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 72063613 is about 8489.0289786288. The cubic root of 72063613 is about 416.1392474089.

The spelling of 72063613 in words is "seventy-two million, sixty-three thousand, six hundred thirteen".