1521948049 has 2 divisors, whose sum is σ = 1521948050. Its totient is φ = 1521948048.

The previous prime is 1521948041. The next prime is 1521948067. The reversal of 1521948049 is 9408491251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1308992400 + 212955649 = 36180^2 + 14593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1521948049 - 2³ = 1521948041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1521947996 and 1521948014.

It is not a weakly prime, because it can be changed into another prime (1521948041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760974024 + 760974025.

It is an arithmetic number, because the mean of its divisors is an integer number (760974025).

Almost surely, 2^1521948049 is an apocalyptic number.

It is an amenable number.

1521948049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521948049 is an equidigital number, since it uses as much as digits as its factorization.

1521948049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 1521948049 is about 39012.1525809587. The cubic root of 1521948049 is about 1150.2703961529.

The spelling of 1521948049 in words is "one billion, five hundred twenty-one million, nine hundred forty-eight thousand, forty-nine".