140001389 has 4 divisors (see below), whose sum is σ = 152728800. Its totient is φ = 127273980.

The previous prime is 140001359. The next prime is 140001401. The reversal of 140001389 is 983100041.

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 140001389 - 2⁸ = 140001133 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 (140001349) 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, 6363689 + ... + 6363710.

It is an arithmetic number, because the mean of its divisors is an integer number (38182200).

Almost surely, 2^140001389 is an apocalyptic number.

It is an amenable number.

140001389 is a deficient number, since it is larger than the sum of its proper divisors (12727411).

140001389 is a wasteful number, since it uses less digits than its factorization.

140001389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12727410.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 140001389 is about 11832.2182620166. The cubic root of 140001389 is about 519.2511274114.

The spelling of 140001389 in words is "one hundred forty million, one thousand, three hundred eighty-nine".