64139342 has 4 divisors (see below), whose sum is σ = 96209016. Its totient is φ = 32069670.

The previous prime is 64139323. The next prime is 64139347. The reversal of 64139342 is 24393146.

64139342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×64139342² = 8227710384385928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64139299 and 64139308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64139347) 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, 16034834 + ... + 16034837.

It is an arithmetic number, because the mean of its divisors is an integer number (24052254).

Almost surely, 2^64139342 is an apocalyptic number.

64139342 is a deficient number, since it is larger than the sum of its proper divisors (32069674).

64139342 is a wasteful number, since it uses less digits than its factorization.

64139342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32069673.

The product of its digits is 15552, while the sum is 32.

The square root of 64139342 is about 8008.7041398718. The cubic root of 64139342 is about 400.2900854086.

The spelling of 64139342 in words is "sixty-four million, one hundred thirty-nine thousand, three hundred forty-two".