140988257 has 2 divisors, whose sum is σ = 140988258. Its totient is φ = 140988256.

The previous prime is 140988181. The next prime is 140988277. The reversal of 140988257 is 752889041.

140988257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121969936 + 19018321 = 11044^2 + 4361^2 .

It is a cyclic number.

It is not a de Polignac number, because 140988257 - 2²² = 136793953 is a prime.

It is a super-2 number, since 2×140988257² = 39755377223796098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140988277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70494128 + 70494129.

It is an arithmetic number, because the mean of its divisors is an integer number (70494129).

Almost surely, 2^140988257 is an apocalyptic number.

It is an amenable number.

140988257 is a deficient number, since it is larger than the sum of its proper divisors (1).

140988257 is an equidigital number, since it uses as much as digits as its factorization.

140988257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 140988257 is about 11873.8476072417. The cubic root of 140988257 is about 520.4683366963.

The spelling of 140988257 in words is "one hundred forty million, nine hundred eighty-eight thousand, two hundred fifty-seven".