40520873 has 2 divisors, whose sum is σ = 40520874. Its totient is φ = 40520872.

The previous prime is 40520869. The next prime is 40520881. The reversal of 40520873 is 37802504.

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., 39100009 + 1420864 = 6253^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 40520873 - 2² = 40520869 is a prime.

It is a super-2 number, since 2×40520873² = 3283882297364258, which contains 22 as substring.

It is equal to p_2463446 and since 40520873 and 2463446 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40520773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20260436 + 20260437.

It is an arithmetic number, because the mean of its divisors is an integer number (20260437).

Almost surely, 2^40520873 is an apocalyptic number.

It is an amenable number.

40520873 is a deficient number, since it is larger than the sum of its proper divisors (1).

40520873 is an equidigital number, since it uses as much as digits as its factorization.

40520873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 40520873 is about 6365.6007571949. The cubic root of 40520873 is about 343.4732592272.

The spelling of 40520873 in words is "forty million, five hundred twenty thousand, eight hundred seventy-three".