19949207 has 2 divisors, whose sum is σ = 19949208. Its totient is φ = 19949206.

The previous prime is 19949203. The next prime is 19949219. The reversal of 19949207 is 70294991.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19949207 - 2² = 19949203 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 (19949201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9974603 + 9974604.

It is an arithmetic number, because the mean of its divisors is an integer number (9974604).

Almost surely, 2^19949207 is an apocalyptic number.

19949207 is a deficient number, since it is larger than the sum of its proper divisors (1).

19949207 is an equidigital number, since it uses as much as digits as its factorization.

19949207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 19949207 is about 4466.4535148146. The cubic root of 19949207 is about 271.2117778333.

The spelling of 19949207 in words is "nineteen million, nine hundred forty-nine thousand, two hundred seven".