1972399411 has 2 divisors, whose sum is σ = 1972399412. Its totient is φ = 1972399410.

The previous prime is 1972399409. The next prime is 1972399447. The reversal of 1972399411 is 1149932791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1972399411 - 2¹ = 1972399409 is a prime.

Together with 1972399409, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1972399711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986199705 + 986199706.

It is an arithmetic number, because the mean of its divisors is an integer number (986199706).

Almost surely, 2^1972399411 is an apocalyptic number.

1972399411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972399411 is an equidigital number, since it uses as much as digits as its factorization.

1972399411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 46.

The square root of 1972399411 is about 44411.7035363428. The cubic root of 1972399411 is about 1254.0984220101.

The spelling of 1972399411 in words is "one billion, nine hundred seventy-two million, three hundred ninety-nine thousand, four hundred eleven".