40520737 has 2 divisors, whose sum is σ = 40520738. Its totient is φ = 40520736.

The previous prime is 40520717. The next prime is 40520761. The reversal of 40520737 is 73702504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28472896 + 12047841 = 5336^2 + 3471^2 .

It is a cyclic number.

It is not a de Polignac number, because 40520737 - 2¹¹ = 40518689 is a prime.

It is not a weakly prime, because it can be changed into another prime (40520717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20260368 + 20260369.

It is an arithmetic number, because the mean of its divisors is an integer number (20260369).

Almost surely, 2^40520737 is an apocalyptic number.

It is an amenable number.

40520737 is a deficient number, since it is larger than the sum of its proper divisors (1).

40520737 is an equidigital number, since it uses as much as digits as its factorization.

40520737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 40520737 is about 6365.5900747692. The cubic root of 40520737 is about 343.4728749609.

The spelling of 40520737 in words is "forty million, five hundred twenty thousand, seven hundred thirty-seven".