19949077 has 2 divisors, whose sum is σ = 19949078. Its totient is φ = 19949076.

The previous prime is 19949057. The next prime is 19949093. The reversal of 19949077 is 77094991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19439281 + 509796 = 4409^2 + 714^2 .

It is a cyclic number.

It is not a de Polignac number, because 19949077 - 2⁷ = 19948949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19949047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9974538 + 9974539.

It is an arithmetic number, because the mean of its divisors is an integer number (9974539).

Almost surely, 2^19949077 is an apocalyptic number.

It is an amenable number.

19949077 is a deficient number, since it is larger than the sum of its proper divisors (1).

19949077 is an equidigital number, since it uses as much as digits as its factorization.

19949077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 19949077 is about 4466.4389618576. The cubic root of 19949077 is about 271.2111887104.

The spelling of 19949077 in words is "nineteen million, nine hundred forty-nine thousand, seventy-seven".