1513664749 has 2 divisors, whose sum is σ = 1513664750. Its totient is φ = 1513664748.

The previous prime is 1513664723. The next prime is 1513664813. The reversal of 1513664749 is 9474663151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200622500 + 313042249 = 34650^2 + 17693^2 .

It is an emirp because it is prime and its reverse (9474663151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1513664749 - 2⁹ = 1513664237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1513664699 and 1513664708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1513664149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756832374 + 756832375.

It is an arithmetic number, because the mean of its divisors is an integer number (756832375).

Almost surely, 2^1513664749 is an apocalyptic number.

It is an amenable number.

1513664749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1513664749 is an equidigital number, since it uses as much as digits as its factorization.

1513664749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 1513664749 is about 38905.8446637520. The cubic root of 1513664749 is about 1148.1797919693.

The spelling of 1513664749 in words is "one billion, five hundred thirteen million, six hundred sixty-four thousand, seven hundred forty-nine".