19941407 has 2 divisors, whose sum is σ = 19941408. Its totient is φ = 19941406.

The previous prime is 19941403. The next prime is 19941419. The reversal of 19941407 is 70414991.

19941407 is nontrivially palindromic in base 7.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19941407 - 2² = 19941403 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19941403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9970703 + 9970704.

It is an arithmetic number, because the mean of its divisors is an integer number (9970704).

Almost surely, 2^19941407 is an apocalyptic number.

19941407 is a deficient number, since it is larger than the sum of its proper divisors (1).

19941407 is an equidigital number, since it uses as much as digits as its factorization.

19941407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 19941407 is about 4465.5802534497. The cubic root of 19941407 is about 271.1764259246.

The spelling of 19941407 in words is "nineteen million, nine hundred forty-one thousand, four hundred seven".