140649957 has 24 divisors (see below), whose sum is σ = 235996800. Its totient is φ = 79051680.

The previous prime is 140649953. The next prime is 140649973. The reversal of 140649957 is 759946041.

It is not a de Polignac number, because 140649957 - 2² = 140649953 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140649953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14457 + ... + 22142.

It is an arithmetic number, because the mean of its divisors is an integer number (9833200).

Almost surely, 2^140649957 is an apocalyptic number.

It is an amenable number.

140649957 is a deficient number, since it is larger than the sum of its proper divisors (95346843).

140649957 is a wasteful number, since it uses less digits than its factorization.

140649957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36673 (or 36670 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 140649957 is about 11859.5934584622. The cubic root of 140649957 is about 520.0517169963.

The spelling of 140649957 in words is "one hundred forty million, six hundred forty-nine thousand, nine hundred fifty-seven".