72840629 has 2 divisors, whose sum is σ = 72840630. Its totient is φ = 72840628.

The previous prime is 72840619. The next prime is 72840643. The reversal of 72840629 is 92604827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65577604 + 7263025 = 8098^2 + 2695^2 .

It is a cyclic number.

It is not a de Polignac number, because 72840629 - 2⁴ = 72840613 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72840592 and 72840601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72840619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36420314 + 36420315.

It is an arithmetic number, because the mean of its divisors is an integer number (36420315).

Almost surely, 2^72840629 is an apocalyptic number.

It is an amenable number.

72840629 is a deficient number, since it is larger than the sum of its proper divisors (1).

72840629 is an equidigital number, since it uses as much as digits as its factorization.

72840629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 72840629 is about 8534.6721671075. The cubic root of 72840629 is about 417.6295585578.

The spelling of 72840629 in words is "seventy-two million, eight hundred forty thousand, six hundred twenty-nine".