1040138207 has 2 divisors, whose sum is σ = 1040138208. Its totient is φ = 1040138206.

The previous prime is 1040138179. The next prime is 1040138213. The reversal of 1040138207 is 7028310401.

1040138207 is nontrivially palindromic in base 4.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1040138207 - 2²⁰ = 1039089631 is a prime.

It is a super-2 number, since 2×1040138207² = 2163774979322349698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040108207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520069103 + 520069104.

It is an arithmetic number, because the mean of its divisors is an integer number (520069104).

Almost surely, 2^1040138207 is an apocalyptic number.

1040138207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040138207 is an equidigital number, since it uses as much as digits as its factorization.

1040138207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1040138207 is about 32251.1737305792. The cubic root of 1040138207 is about 1013.2042818713.

Adding to 1040138207 its reverse (7028310401), we get a palindrome (8068448608).

The spelling of 1040138207 in words is "one billion, forty million, one hundred thirty-eight thousand, two hundred seven".