63972019 has 2 divisors, whose sum is σ = 63972020. Its totient is φ = 63972018.

The previous prime is 63972011. The next prime is 63972047. The reversal of 63972019 is 91027936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63972019 - 2³ = 63972011 is a prime.

It is a super-2 number, since 2×63972019² = 8184838429872722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63972011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31986009 + 31986010.

It is an arithmetic number, because the mean of its divisors is an integer number (31986010).

Almost surely, 2^63972019 is an apocalyptic number.

63972019 is a deficient number, since it is larger than the sum of its proper divisors (1).

63972019 is an equidigital number, since it uses as much as digits as its factorization.

63972019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 63972019 is about 7998.2509963116. The cubic root of 63972019 is about 399.9416977525.

The spelling of 63972019 in words is "sixty-three million, nine hundred seventy-two thousand, nineteen".