262139389 has 4 divisors (see below), whose sum is σ = 262765440. Its totient is φ = 261513340.

The previous prime is 262139377. The next prime is 262139393. The reversal of 262139389 is 983931262.

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 262139389 - 2⁷ = 262139261 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 (262139329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312397 + ... + 313234.

It is an arithmetic number, because the mean of its divisors is an integer number (65691360).

Almost surely, 2^262139389 is an apocalyptic number.

It is an amenable number.

262139389 is a deficient number, since it is larger than the sum of its proper divisors (626051).

262139389 is an equidigital number, since it uses as much as digits as its factorization.

262139389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626050.

The product of its digits is 139968, while the sum is 43.

The square root of 262139389 is about 16190.7192242964. The cubic root of 262139389 is about 639.9962475366.

The spelling of 262139389 in words is "two hundred sixty-two million, one hundred thirty-nine thousand, three hundred eighty-nine".