140438357 has 2 divisors, whose sum is σ = 140438358. Its totient is φ = 140438356.

The previous prime is 140438341. The next prime is 140438359. The reversal of 140438357 is 753834041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73427761 + 67010596 = 8569^2 + 8186^2 .

It is a cyclic number.

It is not a de Polignac number, because 140438357 - 2⁴ = 140438341 is a prime.

Together with 140438359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140438359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70219178 + 70219179.

It is an arithmetic number, because the mean of its divisors is an integer number (70219179).

Almost surely, 2^140438357 is an apocalyptic number.

It is an amenable number.

140438357 is a deficient number, since it is larger than the sum of its proper divisors (1).

140438357 is an equidigital number, since it uses as much as digits as its factorization.

140438357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 140438357 is about 11850.6690528425. The cubic root of 140438357 is about 519.7907898542.

The spelling of 140438357 in words is "one hundred forty million, four hundred thirty-eight thousand, three hundred fifty-seven".