1898429 has 4 divisors (see below), whose sum is σ = 2044476. Its totient is φ = 1752384.

The previous prime is 1898419. The next prime is 1898431. The reversal of 1898429 is 9248981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9248981 = 7 ⋅1321283.

It can be written as a sum of positive squares in 2 ways, for example, as 806404 + 1092025 = 898^2 + 1045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1898429 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 (1898419) 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, 73004 + ... + 73029.

It is an arithmetic number, because the mean of its divisors is an integer number (511119).

2^1898429 is an apocalyptic number.

It is an amenable number.

1898429 is a deficient number, since it is larger than the sum of its proper divisors (146047).

1898429 is a wasteful number, since it uses less digits than its factorization.

1898429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146046.

The product of its digits is 41472, while the sum is 41.

The square root of 1898429 is about 1377.8348957694. The cubic root of 1898429 is about 123.8220870341.

The spelling of 1898429 in words is "one million, eight hundred ninety-eight thousand, four hundred twenty-nine".