4631721247 has 4 divisors (see below), whose sum is σ = 4904175456. Its totient is φ = 4359267040.

The previous prime is 4631721233. The next prime is 4631721271. The reversal of 4631721247 is 7421271364.

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

It is a cyclic number.

It is not a de Polignac number, because 4631721247 - 2¹⁹ = 4631196959 is a prime.

It is a super-2 number, since 2×4631721247² = 42905683419822470018, 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 (4631721217) 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, 136227079 + ... + 136227112.

It is an arithmetic number, because the mean of its divisors is an integer number (1226043864).

Almost surely, 2^4631721247 is an apocalyptic number.

4631721247 is a deficient number, since it is larger than the sum of its proper divisors (272454209).

4631721247 is a wasteful number, since it uses less digits than its factorization.

4631721247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272454208.

The product of its digits is 56448, while the sum is 37.

The square root of 4631721247 is about 68056.7501942313. The cubic root of 4631721247 is about 1666.9176229618.

The spelling of 4631721247 in words is "four billion, six hundred thirty-one million, seven hundred twenty-one thousand, two hundred forty-seven".