140677657 has 2 divisors, whose sum is σ = 140677658. Its totient is φ = 140677656.

The previous prime is 140677631. The next prime is 140677661. The reversal of 140677657 is 756776041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126697536 + 13980121 = 11256^2 + 3739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140677657 is a prime.

It is not a weakly prime, because it can be changed into another prime (140677687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70338828 + 70338829.

It is an arithmetic number, because the mean of its divisors is an integer number (70338829).

Almost surely, 2^140677657 is an apocalyptic number.

It is an amenable number.

140677657 is a deficient number, since it is larger than the sum of its proper divisors (1).

140677657 is an equidigital number, since it uses as much as digits as its factorization.

140677657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 140677657 is about 11860.7612318940. The cubic root of 140677657 is about 520.0858549069.

The spelling of 140677657 in words is "one hundred forty million, six hundred seventy-seven thousand, six hundred fifty-seven".