1213404523 has 2 divisors, whose sum is σ = 1213404524. Its totient is φ = 1213404522.

The previous prime is 1213404481. The next prime is 1213404547. The reversal of 1213404523 is 3254043121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213404523 - 2²¹ = 1211307371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213404623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606702261 + 606702262.

It is an arithmetic number, because the mean of its divisors is an integer number (606702262).

Almost surely, 2^1213404523 is an apocalyptic number.

1213404523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213404523 is an equidigital number, since it uses as much as digits as its factorization.

1213404523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1213404523 is about 34833.9564649208. The cubic root of 1213404523 is about 1066.6007133809.

Adding to 1213404523 its reverse (3254043121), we get a palindrome (4467447644).

The spelling of 1213404523 in words is "one billion, two hundred thirteen million, four hundred four thousand, five hundred twenty-three".