140621357 has 2 divisors, whose sum is σ = 140621358. Its totient is φ = 140621356.

The previous prime is 140621323. The next prime is 140621359. The reversal of 140621357 is 753126041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96452041 + 44169316 = 9821^2 + 6646^2 .

It is an emirp because it is prime and its reverse (753126041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140621357 - 2⁶ = 140621293 is a prime.

Together with 140621359, 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 (140621359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70310678 + 70310679.

It is an arithmetic number, because the mean of its divisors is an integer number (70310679).

Almost surely, 2^140621357 is an apocalyptic number.

It is an amenable number.

140621357 is a deficient number, since it is larger than the sum of its proper divisors (1).

140621357 is an equidigital number, since it uses as much as digits as its factorization.

140621357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 140621357 is about 11858.3876222697. The cubic root of 140621357 is about 520.0164652084.

Adding to 140621357 its reverse (753126041), we get a palindrome (893747398).

The spelling of 140621357 in words is "one hundred forty million, six hundred twenty-one thousand, three hundred fifty-seven".