1520413849 has 2 divisors, whose sum is σ = 1520413850. Its totient is φ = 1520413848.

The previous prime is 1520413847. The next prime is 1520413871. The reversal of 1520413849 is 9483140251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1031694400 + 488719449 = 32120^2 + 22107^2 .

It is a cyclic number.

It is not a de Polignac number, because 1520413849 - 2¹ = 1520413847 is a prime.

Together with 1520413847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1520413841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760206924 + 760206925.

It is an arithmetic number, because the mean of its divisors is an integer number (760206925).

Almost surely, 2^1520413849 is an apocalyptic number.

It is an amenable number.

1520413849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520413849 is an equidigital number, since it uses as much as digits as its factorization.

1520413849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1520413849 is about 38992.4845194558. The cubic root of 1520413849 is about 1149.8837561142.

The spelling of 1520413849 in words is "one billion, five hundred twenty million, four hundred thirteen thousand, eight hundred forty-nine".