146291639 has 8 divisors (see below), whose sum is σ = 158479440. Its totient is φ = 135036408.

The previous prime is 146291611. The next prime is 146291653. The reversal of 146291639 is 936192641.

It is a de Polignac number, because none of the positive numbers 2^k-146291639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 146291596 and 146291605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146291039) 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, 31097 + ... + 35490.

It is an arithmetic number, because the mean of its divisors is an integer number (19809930).

Almost surely, 2^146291639 is an apocalyptic number.

146291639 is a deficient number, since it is larger than the sum of its proper divisors (12187801).

146291639 is an frugal number, since it uses more digits than its factorization.

146291639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66626 (or 66600 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 146291639 is about 12095.1080606996. The cubic root of 146291639 is about 526.9141181267.

The spelling of 146291639 in words is "one hundred forty-six million, two hundred ninety-one thousand, six hundred thirty-nine".