641480047 has 4 divisors (see below), whose sum is σ = 690824680. Its totient is φ = 592135416.

The previous prime is 641480039. The next prime is 641480069. The reversal of 641480047 is 740084146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740084146 = 2 ⋅370042073.

It is a cyclic number.

It is not a de Polignac number, because 641480047 - 2³ = 641480039 is a prime.

It is a super-2 number, since 2×641480047² = 822993301398244418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641479994 and 641480021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641480027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24672297 + ... + 24672322.

It is an arithmetic number, because the mean of its divisors is an integer number (172706170).

Almost surely, 2^641480047 is an apocalyptic number.

641480047 is a deficient number, since it is larger than the sum of its proper divisors (49344633).

641480047 is a wasteful number, since it uses less digits than its factorization.

641480047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49344632.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 641480047 is about 25327.4563863014. The cubic root of 641480047 is about 862.4376697098.

The spelling of 641480047 in words is "six hundred forty-one million, four hundred eighty thousand, forty-seven".