72091433 has 2 divisors, whose sum is σ = 72091434. Its totient is φ = 72091432.

The previous prime is 72091427. The next prime is 72091457. The reversal of 72091433 is 33419027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55995289 + 16096144 = 7483^2 + 4012^2 .

It is an emirp because it is prime and its reverse (33419027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72091433 - 2¹⁰ = 72090409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72091396 and 72091405.

It is not a weakly prime, because it can be changed into another prime (72091493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36045716 + 36045717.

It is an arithmetic number, because the mean of its divisors is an integer number (36045717).

Almost surely, 2^72091433 is an apocalyptic number.

It is an amenable number.

72091433 is a deficient number, since it is larger than the sum of its proper divisors (1).

72091433 is an equidigital number, since it uses as much as digits as its factorization.

72091433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 72091433 is about 8490.6674060406. The cubic root of 72091433 is about 416.1927904012.

The spelling of 72091433 in words is "seventy-two million, ninety-one thousand, four hundred thirty-three".