72892397 has 2 divisors, whose sum is σ = 72892398. Its totient is φ = 72892396.

The previous prime is 72892373. The next prime is 72892429. The reversal of 72892397 is 79329827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55636681 + 17255716 = 7459^2 + 4154^2 .

It is an emirp because it is prime and its reverse (79329827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72892397 - 2¹⁸ = 72630253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72892367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36446198 + 36446199.

It is an arithmetic number, because the mean of its divisors is an integer number (36446199).

Almost surely, 2^72892397 is an apocalyptic number.

It is an amenable number.

72892397 is a deficient number, since it is larger than the sum of its proper divisors (1).

72892397 is an equidigital number, since it uses as much as digits as its factorization.

72892397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 72892397 is about 8537.7044338628. The cubic root of 72892397 is about 417.7284718865.

The spelling of 72892397 in words is "seventy-two million, eight hundred ninety-two thousand, three hundred ninety-seven".