72089999939389 has 2 divisors, whose sum is σ = 72089999939390. Its totient is φ = 72089999939388.

The previous prime is 72089999939323. The next prime is 72089999939411. The reversal of 72089999939389 is 98393999998027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71501534516164 + 588465423225 = 8455858^2 + 767115^2 .

It is an emirp because it is prime and its reverse (98393999998027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72089999939389 - 2²³ = 72089991550781 is a prime.

It is a super-2 number, since 2×72089999939389² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72089999939297 and 72089999939306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72089999919389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36044999969694 + 36044999969695.

It is an arithmetic number, because the mean of its divisors is an integer number (36044999969695).

Almost surely, 2^{72089999939389} is an apocalyptic number.

It is an amenable number.

72089999939389 is a deficient number, since it is larger than the sum of its proper divisors (1).

72089999939389 is an equidigital number, since it uses as much as digits as its factorization.

72089999939389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38569862016, while the sum is 94.

The spelling of 72089999939389 in words is "seventy-two trillion, eighty-nine billion, nine hundred ninety-nine million, nine hundred thirty-nine thousand, three hundred eighty-nine".