642132934 has 4 divisors (see below), whose sum is σ = 963199404. Its totient is φ = 321066466.

The previous prime is 642132913. The next prime is 642132937. The reversal of 642132934 is 439231246.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 642132934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642132937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160533232 + ... + 160533235.

It is an arithmetic number, because the mean of its divisors is an integer number (240799851).

Almost surely, 2^642132934 is an apocalyptic number.

642132934 is a deficient number, since it is larger than the sum of its proper divisors (321066470).

642132934 is a wasteful number, since it uses less digits than its factorization.

642132934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321066469.

The product of its digits is 31104, while the sum is 34.

The square root of 642132934 is about 25340.3420261053. The cubic root of 642132934 is about 862.7301617493.

The spelling of 642132934 in words is "six hundred forty-two million, one hundred thirty-two thousand, nine hundred thirty-four".