131438029 has 4 divisors (see below), whose sum is σ = 138355840. Its totient is φ = 124520220.

The previous prime is 131438009. The next prime is 131438071. The reversal of 131438029 is 920834131.

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 131438029 - 2¹⁷ = 131306957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131438009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3458877 + ... + 3458914.

It is an arithmetic number, because the mean of its divisors is an integer number (34588960).

Almost surely, 2^131438029 is an apocalyptic number.

131438029 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

131438029 is a deficient number, since it is larger than the sum of its proper divisors (6917811).

131438029 is an equidigital number, since it uses as much as digits as its factorization.

131438029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6917810.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 131438029 is about 11464.6425587543. The cubic root of 131438029 is about 508.4407445035.

The spelling of 131438029 in words is "one hundred thirty-one million, four hundred thirty-eight thousand, twenty-nine".