642470419 has 2 divisors, whose sum is σ = 642470420. Its totient is φ = 642470418.

The previous prime is 642470383. The next prime is 642470429. The reversal of 642470419 is 914074246.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642470419 - 2¹⁹ = 641946131 is a prime.

It is a super-2 number, since 2×642470419² = 825536478580071122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (642470429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321235209 + 321235210.

It is an arithmetic number, because the mean of its divisors is an integer number (321235210).

Almost surely, 2^642470419 is an apocalyptic number.

642470419 is a deficient number, since it is larger than the sum of its proper divisors (1).

642470419 is an equidigital number, since it uses as much as digits as its factorization.

642470419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 642470419 is about 25347.0001972620. Note that the first 3 decimals coincide. The cubic root of 642470419 is about 862.8812766147.

The spelling of 642470419 in words is "six hundred forty-two million, four hundred seventy thousand, four hundred nineteen".