146643641 has 4 divisors (see below), whose sum is σ = 148652532. Its totient is φ = 144634752.

The previous prime is 146643611. The next prime is 146643659. The reversal of 146643641 is 146346641.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29376400 + 117267241 = 5420^2 + 10829^2 .

It is a cyclic number.

It is not a de Polignac number, because 146643641 - 2¹⁸ = 146381497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146643611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004336 + ... + 1004481.

It is an arithmetic number, because the mean of its divisors is an integer number (37163133).

Almost surely, 2^146643641 is an apocalyptic number.

It is an amenable number.

146643641 is a deficient number, since it is larger than the sum of its proper divisors (2008891).

146643641 is an equidigital number, since it uses as much as digits as its factorization.

146643641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008890.

The product of its digits is 41472, while the sum is 35.

The square root of 146643641 is about 12109.6507381510. The cubic root of 146643641 is about 527.3363939363.

The spelling of 146643641 in words is "one hundred forty-six million, six hundred forty-three thousand, six hundred forty-one".