140021430077 has 2 divisors, whose sum is σ = 140021430078. Its totient is φ = 140021430076.

The previous prime is 140021430011. The next prime is 140021430079. The reversal of 140021430077 is 770034120041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139860292441 + 161137636 = 373979^2 + 12694^2 .

It is a cyclic number.

It is not a de Polignac number, because 140021430077 - 2¹² = 140021425981 is a prime.

Together with 140021430079, 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 (140021430079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70010715038 + 70010715039.

It is an arithmetic number, because the mean of its divisors is an integer number (70010715039).

Almost surely, 2^140021430077 is an apocalyptic number.

It is an amenable number.

140021430077 is a deficient number, since it is larger than the sum of its proper divisors (1).

140021430077 is an equidigital number, since it uses as much as digits as its factorization.

140021430077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The spelling of 140021430077 in words is "one hundred forty billion, twenty-one million, four hundred thirty thousand, seventy-seven".