2138429 has 2 divisors, whose sum is σ = 2138430. Its totient is φ = 2138428.

The previous prime is 2138419. The next prime is 2138467. The reversal of 2138429 is 9248312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1651225 + 487204 = 1285^2 + 698^2 .

It is a cyclic number.

It is not a de Polignac number, because 2138429 - 2¹⁶ = 2072893 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 1 + 3⁵ + 8⁵ + 4³ + 2²¹ + 9 .

It is equal to p₁₅₈₄₅₆ and since 2138429 and 158456 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2138419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069214 + 1069215.

It is an arithmetic number, because the mean of its divisors is an integer number (1069215).

2^2138429 is an apocalyptic number.

It is an amenable number.

2138429 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138429 is an equidigital number, since it uses as much as digits as its factorization.

2138429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 2138429 is about 1462.3368285043. The cubic root of 2138429 is about 128.8343325332.

The spelling of 2138429 in words is "two million, one hundred thirty-eight thousand, four hundred twenty-nine".