72291139229 has 2 divisors, whose sum is σ = 72291139230. Its totient is φ = 72291139228.

The previous prime is 72291139183. The next prime is 72291139231. The reversal of 72291139229 is 92293119227.

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., 72053054329 + 238084900 = 268427^2 + 15430^2 .

It is a cyclic number.

It is not a de Polignac number, because 72291139229 - 2⁸ = 72291138973 is a prime.

It is a super-3 number, since 3×72291139229³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

Together with 72291139231, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72291139259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36145569614 + 36145569615.

It is an arithmetic number, because the mean of its divisors is an integer number (36145569615).

Almost surely, 2^72291139229 is an apocalyptic number.

It is an amenable number.

72291139229 is a deficient number, since it is larger than the sum of its proper divisors (1).

72291139229 is an equidigital number, since it uses as much as digits as its factorization.

72291139229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The spelling of 72291139229 in words is "seventy-two billion, two hundred ninety-one million, one hundred thirty-nine thousand, two hundred twenty-nine".