140399123 has 2 divisors, whose sum is σ = 140399124. Its totient is φ = 140399122.

The previous prime is 140399117. The next prime is 140399137. The reversal of 140399123 is 321993041.

It is a weak prime.

It is an emirp because it is prime and its reverse (321993041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140399123 - 2⁶ = 140399059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140399123.

It is not a weakly prime, because it can be changed into another prime (140399023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70199561 + 70199562.

It is an arithmetic number, because the mean of its divisors is an integer number (70199562).

Almost surely, 2^140399123 is an apocalyptic number.

140399123 is a deficient number, since it is larger than the sum of its proper divisors (1).

140399123 is an equidigital number, since it uses as much as digits as its factorization.

140399123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 140399123 is about 11849.0135876367. The cubic root of 140399123 is about 519.7423810204.

The spelling of 140399123 in words is "one hundred forty million, three hundred ninety-nine thousand, one hundred twenty-three".