1972549519 has 2 divisors, whose sum is σ = 1972549520. Its totient is φ = 1972549518.

The previous prime is 1972549489. The next prime is 1972549547. The reversal of 1972549519 is 9159452791.

It is a strong prime.

It is an emirp because it is prime and its reverse (9159452791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1972549519 is a prime.

It is a super-2 number, since 2×1972549519² = 7781903209814262722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972549589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986274759 + 986274760.

It is an arithmetic number, because the mean of its divisors is an integer number (986274760).

Almost surely, 2^1972549519 is an apocalyptic number.

1972549519 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972549519 is an equidigital number, since it uses as much as digits as its factorization.

1972549519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 52.

The square root of 1972549519 is about 44413.3934641342. The cubic root of 1972549519 is about 1254.1302352811.

The spelling of 1972549519 in words is "one billion, nine hundred seventy-two million, five hundred forty-nine thousand, five hundred nineteen".