641007249 has 4 divisors (see below), whose sum is σ = 854676336. Its totient is φ = 427338164.

The previous prime is 641007247. The next prime is 641007259. The reversal of 641007249 is 942700146.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 641007249 - 2¹ = 641007247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641007247) 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, 106834539 + ... + 106834544.

It is an arithmetic number, because the mean of its divisors is an integer number (213669084).

Almost surely, 2^641007249 is an apocalyptic number.

It is an amenable number.

641007249 is a deficient number, since it is larger than the sum of its proper divisors (213669087).

641007249 is a wasteful number, since it uses less digits than its factorization.

641007249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213669086.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 641007249 is about 25318.1209610824. The cubic root of 641007249 is about 862.2257332529.

The spelling of 641007249 in words is "six hundred forty-one million, seven thousand, two hundred forty-nine".