140939481 has 4 divisors (see below), whose sum is σ = 187919312. Its totient is φ = 93959652.

The previous prime is 140939471. The next prime is 140939497. The reversal of 140939481 is 184939041.

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 not a de Polignac number, because 140939481 - 2¹⁸ = 140677337 is a prime.

It is a super-2 number, since 2×140939481² = 39727874609098722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140939411) 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, 23489911 + ... + 23489916.

It is an arithmetic number, because the mean of its divisors is an integer number (46979828).

Almost surely, 2^140939481 is an apocalyptic number.

It is an amenable number.

140939481 is a deficient number, since it is larger than the sum of its proper divisors (46979831).

140939481 is an equidigital number, since it uses as much as digits as its factorization.

140939481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46979830.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 140939481 is about 11871.7935039319. The cubic root of 140939481 is about 520.4083097308.

The spelling of 140939481 in words is "one hundred forty million, nine hundred thirty-nine thousand, four hundred eighty-one".