1969231 has 4 divisors (see below), whose sum is σ = 2148264. Its totient is φ = 1790200.

The previous prime is 1969223. The next prime is 1969241. The reversal of 1969231 is 1329691.

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 1969231 - 2³ = 1969223 is a prime.

It is a super-2 number, since 2×1969231² = 7755741462722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1969193 and 1969202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1969241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89500 + ... + 89521.

It is an arithmetic number, because the mean of its divisors is an integer number (537066).

2^1969231 is an apocalyptic number.

1969231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1969231 is a deficient number, since it is larger than the sum of its proper divisors (179033).

1969231 is a wasteful number, since it uses less digits than its factorization.

1969231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179032.

The product of its digits is 2916, while the sum is 31.

The square root of 1969231 is about 1403.2929131154. The cubic root of 1969231 is about 125.3426545115.

The spelling of 1969231 in words is "one million, nine hundred sixty-nine thousand, two hundred thirty-one".