31641429 has 4 divisors (see below), whose sum is σ = 42188576. Its totient is φ = 21094284.

The previous prime is 31641427. The next prime is 31641439. The reversal of 31641429 is 92414613.

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 not a de Polignac number, because 31641429 - 2¹ = 31641427 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31641396 and 31641405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31641427) 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, 5273569 + ... + 5273574.

It is an arithmetic number, because the mean of its divisors is an integer number (10547144).

Almost surely, 2^31641429 is an apocalyptic number.

It is an amenable number.

31641429 is a deficient number, since it is larger than the sum of its proper divisors (10547147).

31641429 is a wasteful number, since it uses less digits than its factorization.

31641429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10547146.

The product of its digits is 5184, while the sum is 30.

The square root of 31641429 is about 5625.0714662127. The cubic root of 31641429 is about 316.2899284575.

The spelling of 31641429 in words is "thirty-one million, six hundred forty-one thousand, four hundred twenty-nine".