105729431 has 4 divisors (see below), whose sum is σ = 105763872. Its totient is φ = 105694992.

The previous prime is 105729427. The next prime is 105729439. The reversal of 105729431 is 134927501.

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 105729431 - 2² = 105729427 is a prime.

It is a super-2 number, since 2×105729431² = 22357425159167522, 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 (105729439) 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, 12110 + ... + 18923.

It is an arithmetic number, because the mean of its divisors is an integer number (26440968).

Almost surely, 2^105729431 is an apocalyptic number.

105729431 is a deficient number, since it is larger than the sum of its proper divisors (34441).

105729431 is an equidigital number, since it uses as much as digits as its factorization.

105729431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34440.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 105729431 is about 10282.4817529622. The cubic root of 105729431 is about 472.8593326817.

The spelling of 105729431 in words is "one hundred five million, seven hundred twenty-nine thousand, four hundred thirty-one".