431749279489 has 4 divisors (see below), whose sum is σ = 470999214000. Its totient is φ = 392499344980.

The previous prime is 431749279477. The next prime is 431749279601. The reversal of 431749279489 is 984972947134.

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 431749279489 - 2¹³ = 431749271297 is a prime.

It is a super-2 number, since 2×431749279489² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431749229489) 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, 19624967239 + ... + 19624967260.

It is an arithmetic number, because the mean of its divisors is an integer number (117749803500).

Almost surely, 2^431749279489 is an apocalyptic number.

It is an amenable number.

431749279489 is a deficient number, since it is larger than the sum of its proper divisors (39249934511).

431749279489 is a wasteful number, since it uses less digits than its factorization.

431749279489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39249934510.

The product of its digits is 109734912, while the sum is 67.

The spelling of 431749279489 in words is "four hundred thirty-one billion, seven hundred forty-nine million, two hundred seventy-nine thousand, four hundred eighty-nine".