140673481 has 4 divisors (see below), whose sum is σ = 151494532. Its totient is φ = 129852432.

The previous prime is 140673479. The next prime is 140673493. The reversal of 140673481 is 184376041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 184376041 = 5701 ⋅32341.

It can be written as a sum of positive squares in 2 ways, for example, as 8791225 + 131882256 = 2965^2 + 11484^2 .

It is a cyclic number.

It is not a de Polignac number, because 140673481 - 2¹ = 140673479 is a prime.

It is a super-2 number, since 2×140673481² = 39578056513314722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140673881) 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, 5410506 + ... + 5410531.

It is an arithmetic number, because the mean of its divisors is an integer number (37873633).

Almost surely, 2^140673481 is an apocalyptic number.

It is an amenable number.

140673481 is a deficient number, since it is larger than the sum of its proper divisors (10821051).

140673481 is a wasteful number, since it uses less digits than its factorization.

140673481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10821050.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 140673481 is about 11860.5851879239. The cubic root of 140673481 is about 520.0807086265.

The spelling of 140673481 in words is "one hundred forty million, six hundred seventy-three thousand, four hundred eighty-one".