1513123623 has 12 divisors (see below), whose sum is σ = 2384316168. Its totient is φ = 917044560.

The previous prime is 1513123613. The next prime is 1513123627. The reversal of 1513123623 is 3263213151.

1513123623 is a `hidden beast` number, since 1 + 5 + 1 + 31 + 2 + 3 + 623 = 666.

1513123623 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1513123623 - 2³⁰ = 439381799 is a prime.

It is a super-2 number, since 2×1513123623² = 4579086196961292258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1513123627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7641940 + ... + 7642137.

It is an arithmetic number, because the mean of its divisors is an integer number (198693014).

Almost surely, 2^1513123623 is an apocalyptic number.

1513123623 is a deficient number, since it is larger than the sum of its proper divisors (871192545).

1513123623 is a wasteful number, since it uses less digits than its factorization.

1513123623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15284094 (or 15284091 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 1513123623 is about 38898.8897399399. The cubic root of 1513123623 is about 1148.0429532161.

Adding to 1513123623 its reverse (3263213151), we get a palindrome (4776336774).

The spelling of 1513123623 in words is "one billion, five hundred thirteen million, one hundred twenty-three thousand, six hundred twenty-three".