641472747 has 16 divisors (see below), whose sum is σ = 906347520. Its totient is φ = 402164352.

The previous prime is 641472743. The next prime is 641472763. The reversal of 641472747 is 747274146.

It is a happy number.

641472747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641472747 - 2² = 641472743 is a prime.

It is a super-2 number, since 2×641472747² = 822974570287452018, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641472699 and 641472708.

It is not an unprimeable number, because it can be changed into a prime (641472743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68154 + ... + 76992.

It is an arithmetic number, because the mean of its divisors is an integer number (56646720).

Almost surely, 2^641472747 is an apocalyptic number.

641472747 is a deficient number, since it is larger than the sum of its proper divisors (264874773).

641472747 is a wasteful number, since it uses less digits than its factorization.

641472747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10282.

The product of its digits is 263424, while the sum is 42.

The square root of 641472747 is about 25327.3122735122. The cubic root of 641472747 is about 862.4343982031.

The spelling of 641472747 in words is "six hundred forty-one million, four hundred seventy-two thousand, seven hundred forty-seven".