39964219 has 2 divisors, whose sum is σ = 39964220. Its totient is φ = 39964218.

The previous prime is 39964187. The next prime is 39964231. The reversal of 39964219 is 91246993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39964219 - 2⁵ = 39964187 is a prime.

It is a super-2 number, since 2×39964219² = 3194277600559922, which contains 22 as substring.

It is a nialpdrome in base 14.

It is not a weakly prime, because it can be changed into another prime (39964289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19982109 + 19982110.

It is an arithmetic number, because the mean of its divisors is an integer number (19982110).

Almost surely, 2^39964219 is an apocalyptic number.

39964219 is a deficient number, since it is larger than the sum of its proper divisors (1).

39964219 is an equidigital number, since it uses as much as digits as its factorization.

39964219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 43.

The square root of 39964219 is about 6321.7259510358. The cubic root of 39964219 is about 341.8931844984.

The spelling of 39964219 in words is "thirty-nine million, nine hundred sixty-four thousand, two hundred nineteen".