140623990873 has 4 divisors (see below), whose sum is σ = 140689674468. Its totient is φ = 140558307280.

The previous prime is 140623990823. The next prime is 140623990877. The reversal of 140623990873 is 378099326041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 378099326041 = 67 ⋅5643273523.

It can be written as a sum of positive squares in 2 ways, for example, as 127183530384 + 13440460489 = 356628^2 + 115933^2 .

It is a cyclic number.

It is not a de Polignac number, because 140623990873 - 2²¹ = 140621893721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140623990873.

It is not an unprimeable number, because it can be changed into a prime (140623990877) 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, 32838586 + ... + 32842867.

It is an arithmetic number, because the mean of its divisors is an integer number (35172418617).

Almost surely, 2^140623990873 is an apocalyptic number.

It is an amenable number.

140623990873 is a deficient number, since it is larger than the sum of its proper divisors (65683595).

140623990873 is an equidigital number, since it uses as much as digits as its factorization.

140623990873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65683594.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 140623990873 in words is "one hundred forty billion, six hundred twenty-three million, nine hundred ninety thousand, eight hundred seventy-three".