140087749 has 2 divisors, whose sum is σ = 140087750. Its totient is φ = 140087748.

The previous prime is 140087737. The next prime is 140087767. The reversal of 140087749 is 947780041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77123524 + 62964225 = 8782^2 + 7935^2 .

It is a cyclic number.

It is not a de Polignac number, because 140087749 - 2⁷ = 140087621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140087789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70043874 + 70043875.

It is an arithmetic number, because the mean of its divisors is an integer number (70043875).

Almost surely, 2^140087749 is an apocalyptic number.

It is an amenable number.

140087749 is a deficient number, since it is larger than the sum of its proper divisors (1).

140087749 is an equidigital number, since it uses as much as digits as its factorization.

140087749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 140087749 is about 11835.8670573811. The cubic root of 140087749 is about 519.3578723289.

The spelling of 140087749 in words is "one hundred forty million, eighty-seven thousand, seven hundred forty-nine".