40120637 has 2 divisors, whose sum is σ = 40120638. Its totient is φ = 40120636.

The previous prime is 40120631. The next prime is 40120643. The reversal of 40120637 is 73602104.

It is a balanced prime because it is at equal distance from previous prime (40120631) and next prime (40120643).

It can be written as a sum of positive squares in only one way, i.e., 39513796 + 606841 = 6286^2 + 779^2 .

It is a cyclic number.

It is not a de Polignac number, because 40120637 - 2⁶ = 40120573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40120631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060318 + 20060319.

It is an arithmetic number, because the mean of its divisors is an integer number (20060319).

Almost surely, 2^40120637 is an apocalyptic number.

It is an amenable number.

40120637 is a deficient number, since it is larger than the sum of its proper divisors (1).

40120637 is an equidigital number, since it uses as much as digits as its factorization.

40120637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 40120637 is about 6334.0853325480. The cubic root of 40120637 is about 342.3386548914.

The spelling of 40120637 in words is "forty million, one hundred twenty thousand, six hundred thirty-seven".