642007619 has 16 divisors (see below), whose sum is σ = 709986816. Its totient is φ = 575688000.

The previous prime is 642007607. The next prime is 642007651. The reversal of 642007619 is 916700246.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642007619 is a prime.

It is a super-2 number, since 2×642007619² = 824347565708098322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642007699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250394 + ... + 252944.

It is an arithmetic number, because the mean of its divisors is an integer number (44374176).

Almost surely, 2^642007619 is an apocalyptic number.

642007619 is a deficient number, since it is larger than the sum of its proper divisors (67979197).

642007619 is a wasteful number, since it uses less digits than its factorization.

642007619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 642007619 is about 25337.8692671661. The cubic root of 642007619 is about 862.6740362660.

The spelling of 642007619 in words is "six hundred forty-two million, seven thousand, six hundred nineteen".