140036381 has 2 divisors, whose sum is σ = 140036382. Its totient is φ = 140036380.

The previous prime is 140036339. The next prime is 140036401. The reversal of 140036381 is 183630041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96924025 + 43112356 = 9845^2 + 6566^2 .

It is a cyclic number.

It is not a de Polignac number, because 140036381 - 2⁶ = 140036317 is a prime.

It is a super-2 number, since 2×140036381² = 39220376007154322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140036381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140036311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70018190 + 70018191.

It is an arithmetic number, because the mean of its divisors is an integer number (70018191).

Almost surely, 2^140036381 is an apocalyptic number.

It is an amenable number.

140036381 is a deficient number, since it is larger than the sum of its proper divisors (1).

140036381 is an equidigital number, since it uses as much as digits as its factorization.

140036381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 140036381 is about 11833.6968441819. The cubic root of 140036381 is about 519.2943844153.

The spelling of 140036381 in words is "one hundred forty million, thirty-six thousand, three hundred eighty-one".