1629013649 has 2 divisors, whose sum is σ = 1629013650. Its totient is φ = 1629013648.

The previous prime is 1629013579. The next prime is 1629013667. The reversal of 1629013649 is 9463109261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1401154624 + 227859025 = 37432^2 + 15095^2 .

It is an emirp because it is prime and its reverse (9463109261) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1629013649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1629013669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814506824 + 814506825.

It is an arithmetic number, because the mean of its divisors is an integer number (814506825).

Almost surely, 2^1629013649 is an apocalyptic number.

It is an amenable number.

1629013649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1629013649 is an equidigital number, since it uses as much as digits as its factorization.

1629013649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 1629013649 is about 40361.0412278970. The cubic root of 1629013649 is about 1176.6344897891.

The spelling of 1629013649 in words is "one billion, six hundred twenty-nine million, thirteen thousand, six hundred forty-nine".