19883797 has 2 divisors, whose sum is σ = 19883798. Its totient is φ = 19883796.

The previous prime is 19883789. The next prime is 19883807. The reversal of 19883797 is 79738891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17690436 + 2193361 = 4206^2 + 1481^2 .

It is a cyclic number.

It is not a de Polignac number, because 19883797 - 2³ = 19883789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19883737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9941898 + 9941899.

It is an arithmetic number, because the mean of its divisors is an integer number (9941899).

Almost surely, 2^19883797 is an apocalyptic number.

It is an amenable number.

19883797 is a deficient number, since it is larger than the sum of its proper divisors (1).

19883797 is an equidigital number, since it uses as much as digits as its factorization.

19883797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 52.

The square root of 19883797 is about 4459.1251384100. The cubic root of 19883797 is about 270.9150344333.

The spelling of 19883797 in words is "nineteen million, eight hundred eighty-three thousand, seven hundred ninety-seven".