641322149 has 4 divisors (see below), whose sum is σ = 690654636. Its totient is φ = 591989664.

The previous prime is 641322139. The next prime is 641322151. The reversal of 641322149 is 941223146.

641322149 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 can be written as a sum of positive squares in 2 ways, for example, as 169650625 + 471671524 = 13025^2 + 21718^2 .

It is a cyclic number.

It is not a de Polignac number, because 641322149 - 2²⁰ = 640273573 is a prime.

It is a super-2 number, since 2×641322149² = 822588197595956402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641322109) 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, 24666224 + ... + 24666249.

It is an arithmetic number, because the mean of its divisors is an integer number (172663659).

Almost surely, 2^641322149 is an apocalyptic number.

It is an amenable number.

641322149 is a deficient number, since it is larger than the sum of its proper divisors (49332487).

641322149 is a wasteful number, since it uses less digits than its factorization.

641322149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49332486.

The product of its digits is 10368, while the sum is 32.

The square root of 641322149 is about 25324.3390634386. The cubic root of 641322149 is about 862.3669019291.

The spelling of 641322149 in words is "six hundred forty-one million, three hundred twenty-two thousand, one hundred forty-nine".