146868639 has 8 divisors (see below), whose sum is σ = 204339072. Its totient is φ = 93655320.

The previous prime is 146868637. The next prime is 146868643. The reversal of 146868639 is 936868641.

146868639 = 377² + 378² + ... + 790².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 146868639 - 2¹ = 146868637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 146868591 and 146868600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146868637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1064197 + ... + 1064334.

It is an arithmetic number, because the mean of its divisors is an integer number (25542384).

Almost surely, 2^146868639 is an apocalyptic number.

146868639 is a deficient number, since it is larger than the sum of its proper divisors (57470433).

146868639 is a wasteful number, since it uses less digits than its factorization.

146868639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128557.

The product of its digits is 1492992, while the sum is 51.

The square root of 146868639 is about 12118.9372058774. The cubic root of 146868639 is about 527.6059567184.

It can be divided in two parts, 1468 and 68639, that added together give a palindrome (70107).

The spelling of 146868639 in words is "one hundred forty-six million, eight hundred sixty-eight thousand, six hundred thirty-nine".