19672949 has 2 divisors, whose sum is σ = 19672950. Its totient is φ = 19672948.

The previous prime is 19672883. The next prime is 19672951. The reversal of 19672949 is 94927691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 3010225 = 4082^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 19672949 - 2¹² = 19668853 is a prime.

It is a Sophie Germain prime.

Together with 19672951, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19672969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9836474 + 9836475.

It is an arithmetic number, because the mean of its divisors is an integer number (9836475).

Almost surely, 2^19672949 is an apocalyptic number.

It is an amenable number.

19672949 is a deficient number, since it is larger than the sum of its proper divisors (1).

19672949 is an equidigital number, since it uses as much as digits as its factorization.

19672949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 19672949 is about 4435.4198222942. The cubic root of 19672949 is about 269.9540342418.

The spelling of 19672949 in words is "nineteen million, six hundred seventy-two thousand, nine hundred forty-nine".