140402993 has 2 divisors, whose sum is σ = 140402994. Its totient is φ = 140402992.

The previous prime is 140402981. The next prime is 140403001. The reversal of 140402993 is 399204041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140375104 + 27889 = 11848^2 + 167^2 .

It is a cyclic number.

It is not a de Polignac number, because 140402993 - 2¹⁰ = 140401969 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140402953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70201496 + 70201497.

It is an arithmetic number, because the mean of its divisors is an integer number (70201497).

Almost surely, 2^140402993 is an apocalyptic number.

It is an amenable number.

140402993 is a deficient number, since it is larger than the sum of its proper divisors (1).

140402993 is an equidigital number, since it uses as much as digits as its factorization.

140402993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 140402993 is about 11849.1768912444. The cubic root of 140402993 is about 519.7471564171.

The spelling of 140402993 in words is "one hundred forty million, four hundred two thousand, nine hundred ninety-three".