72842369 has 2 divisors, whose sum is σ = 72842370. Its totient is φ = 72842368.

The previous prime is 72842353. The next prime is 72842383. The reversal of 72842369 is 96324827.

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., 44890000 + 27952369 = 6700^2 + 5287^2 .

It is a cyclic number.

It is not a de Polignac number, because 72842369 - 2⁴ = 72842353 is a prime.

It is a super-2 number, since 2×72842369² = 10612021443064322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72842389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36421184 + 36421185.

It is an arithmetic number, because the mean of its divisors is an integer number (36421185).

Almost surely, 2^72842369 is an apocalyptic number.

It is an amenable number.

72842369 is a deficient number, since it is larger than the sum of its proper divisors (1).

72842369 is an equidigital number, since it uses as much as digits as its factorization.

72842369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 72842369 is about 8534.7741036304. The cubic root of 72842369 is about 417.6328839439.

The spelling of 72842369 in words is "seventy-two million, eight hundred forty-two thousand, three hundred sixty-nine".