431401012109 has 4 divisors (see below), whose sum is σ = 431402500704. Its totient is φ = 431399523516.

The previous prime is 431401012093. The next prime is 431401012129. The reversal of 431401012109 is 901210104134.

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, and also an emirpimes, since its reverse is a distinct semiprime: 901210104134 = 2 ⋅450605052067.

It is a cyclic number.

It is not a de Polignac number, because 431401012109 - 2⁴ = 431401012093 is a prime.

It is a super-2 number, since 2×431401012109² (a number of 24 digits) 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 (431401012129) 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, 153017 + ... + 941390.

It is an arithmetic number, because the mean of its divisors is an integer number (107850625176).

Almost surely, 2^431401012109 is an apocalyptic number.

It is an amenable number.

431401012109 is a deficient number, since it is larger than the sum of its proper divisors (1488595).

431401012109 is a wasteful number, since it uses less digits than its factorization.

431401012109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488594.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 431401012109 in words is "four hundred thirty-one billion, four hundred one million, twelve thousand, one hundred nine".