1513123207 has 4 divisors (see below), whose sum is σ = 1519789176. Its totient is φ = 1506457240.

The previous prime is 1513123187. The next prime is 1513123211. The reversal of 1513123207 is 7023213151.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7023213151 = 1741 ⋅4034011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1513123207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1513123247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3332644 + ... + 3333097.

It is an arithmetic number, because the mean of its divisors is an integer number (379947294).

Almost surely, 2^1513123207 is an apocalyptic number.

1513123207 is a deficient number, since it is larger than the sum of its proper divisors (6665969).

1513123207 is an equidigital number, since it uses as much as digits as its factorization.

1513123207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6665968.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1513123207 is about 38898.8843927432. The cubic root of 1513123207 is about 1148.0428480064.

Adding to 1513123207 its reverse (7023213151), we get a palindrome (8536336358).

The spelling of 1513123207 in words is "one billion, five hundred thirteen million, one hundred twenty-three thousand, two hundred seven".