1207910138 has 4 divisors (see below), whose sum is σ = 1811865210. Its totient is φ = 603955068.

The previous prime is 1207910131. The next prime is 1207910147. The reversal of 1207910138 is 8310197021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8310197021 = 7 ⋅1187171003.

It can be written as a sum of positive squares in only one way, i.e., 1207771009 + 139129 = 34753^2 + 373^2 .

It is not an unprimeable number, because it can be changed into a prime (1207910131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301977533 + ... + 301977536.

Almost surely, 2^1207910138 is an apocalyptic number.

1207910138 is a deficient number, since it is larger than the sum of its proper divisors (603955072).

1207910138 is an equidigital number, since it uses as much as digits as its factorization.

1207910138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603955071.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1207910138 is about 34755.0016256653. The cubic root of 1207910138 is about 1064.9883951802.

The spelling of 1207910138 in words is "one billion, two hundred seven million, nine hundred ten thousand, one hundred thirty-eight".