1548665413 has 2 divisors, whose sum is σ = 1548665414. Its totient is φ = 1548665412.

The previous prime is 1548665411. The next prime is 1548665429. The reversal of 1548665413 is 3145668451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 789497604 + 759167809 = 28098^2 + 27553^2 .

It is an emirp because it is prime and its reverse (3145668451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1548665413 - 2¹ = 1548665411 is a prime.

It is a super-2 number, since 2×1548665413² = 4796729122844921138, which contains 22 as substring.

Together with 1548665411, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1548665413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1548665411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 774332706 + 774332707.

It is an arithmetic number, because the mean of its divisors is an integer number (774332707).

Almost surely, 2^1548665413 is an apocalyptic number.

It is an amenable number.

1548665413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1548665413 is an equidigital number, since it uses as much as digits as its factorization.

1548665413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 43.

The square root of 1548665413 is about 39353.0864482063. The cubic root of 1548665413 is about 1156.9622791489.

The spelling of 1548665413 in words is "one billion, five hundred forty-eight million, six hundred sixty-five thousand, four hundred thirteen".