381312029 has 4 divisors (see below), whose sum is σ = 435785184. Its totient is φ = 326838876.

The previous prime is 381312017. The next prime is 381312109. The reversal of 381312029 is 920213183.

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: 920213183 = 13691 ⋅67213.

It is not a de Polignac number, because 381312029 - 2⁸ = 381311773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381311992 and 381312010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381312229) 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, 27236567 + ... + 27236580.

It is an arithmetic number, because the mean of its divisors is an integer number (108946296).

Almost surely, 2^381312029 is an apocalyptic number.

It is an amenable number.

381312029 is a deficient number, since it is larger than the sum of its proper divisors (54473155).

381312029 is an equidigital number, since it uses as much as digits as its factorization.

381312029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54473154.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 381312029 is about 19527.2125250892. The cubic root of 381312029 is about 725.1483035497.

The spelling of 381312029 in words is "three hundred eighty-one million, three hundred twelve thousand, twenty-nine".