40072289 has 2 divisors, whose sum is σ = 40072290. Its totient is φ = 40072288.

The previous prime is 40072283. The next prime is 40072301. The reversal of 40072289 is 98227004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39589264 + 483025 = 6292^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 40072289 - 2²⁴ = 23295073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40072283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20036144 + 20036145.

It is an arithmetic number, because the mean of its divisors is an integer number (20036145).

Almost surely, 2^40072289 is an apocalyptic number.

It is an amenable number.

40072289 is a deficient number, since it is larger than the sum of its proper divisors (1).

40072289 is an equidigital number, since it uses as much as digits as its factorization.

40072289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 40072289 is about 6330.2676878628. The cubic root of 40072289 is about 342.2010861032.

The spelling of 40072289 in words is "forty million, seventy-two thousand, two hundred eighty-nine".