140538793 has 2 divisors, whose sum is σ = 140538794. Its totient is φ = 140538792.

The previous prime is 140538757. The next prime is 140538803. The reversal of 140538793 is 397835041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85229824 + 55308969 = 9232^2 + 7437^2 .

It is an emirp because it is prime and its reverse (397835041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140538793 - 2¹³ = 140530601 is a prime.

It is not a weakly prime, because it can be changed into another prime (140538733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70269396 + 70269397.

It is an arithmetic number, because the mean of its divisors is an integer number (70269397).

Almost surely, 2^140538793 is an apocalyptic number.

It is an amenable number.

140538793 is a deficient number, since it is larger than the sum of its proper divisors (1).

140538793 is an equidigital number, since it uses as much as digits as its factorization.

140538793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 140538793 is about 11854.9058621315. The cubic root of 140538793 is about 519.9146716499.

The spelling of 140538793 in words is "one hundred forty million, five hundred thirty-eight thousand, seven hundred ninety-three".