140839973 has 4 divisors (see below), whose sum is σ = 141868140. Its totient is φ = 139811808.

The previous prime is 140839957. The next prime is 140839991. The reversal of 140839973 is 379938041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108201604 + 32638369 = 10402^2 + 5713^2 .

It is a cyclic number.

It is not a de Polignac number, because 140839973 - 2⁴ = 140839957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140809973) 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, 513878 + ... + 514151.

It is an arithmetic number, because the mean of its divisors is an integer number (35467035).

Almost surely, 2^140839973 is an apocalyptic number.

140839973 is the 6344-th centered heptagonal number.

It is an amenable number.

140839973 is a deficient number, since it is larger than the sum of its proper divisors (1028167).

140839973 is a wasteful number, since it uses less digits than its factorization.

140839973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028166.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 140839973 is about 11867.6018217667. The cubic root of 140839973 is about 520.2858056561.

The spelling of 140839973 in words is "one hundred forty million, eight hundred thirty-nine thousand, nine hundred seventy-three".