40772209 has 2 divisors, whose sum is σ = 40772210. Its totient is φ = 40772208.

The previous prime is 40772203. The next prime is 40772219. The reversal of 40772209 is 90227704.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22896225 + 17875984 = 4785^2 + 4228^2 .

It is a cyclic number.

It is not a de Polignac number, because 40772209 - 2³ = 40772201 is a prime.

It is a super-3 number, since 3×40772209³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (40772201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20386104 + 20386105.

It is an arithmetic number, because the mean of its divisors is an integer number (20386105).

Almost surely, 2^40772209 is an apocalyptic number.

It is an amenable number.

40772209 is a deficient number, since it is larger than the sum of its proper divisors (1).

40772209 is an equidigital number, since it uses as much as digits as its factorization.

40772209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 40772209 is about 6385.3119735844. The cubic root of 40772209 is about 344.1819419051.

The spelling of 40772209 in words is "forty million, seven hundred seventy-two thousand, two hundred nine".