40138607 has 2 divisors, whose sum is σ = 40138608. Its totient is φ = 40138606.

The previous prime is 40138603. The next prime is 40138661. The reversal of 40138607 is 70683104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40138607 - 2² = 40138603 is a prime.

It is a super-2 number, since 2×40138607² = 3222215543800898, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40138607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40138601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20069303 + 20069304.

It is an arithmetic number, because the mean of its divisors is an integer number (20069304).

Almost surely, 2^40138607 is an apocalyptic number.

40138607 is a deficient number, since it is larger than the sum of its proper divisors (1).

40138607 is an equidigital number, since it uses as much as digits as its factorization.

40138607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 40138607 is about 6335.5036895262. The cubic root of 40138607 is about 342.3897583289.

The spelling of 40138607 in words is "forty million, one hundred thirty-eight thousand, six hundred seven".