140007657 has 8 divisors (see below), whose sum is σ = 187286176. Its totient is φ = 93033792.

The previous prime is 140007643. The next prime is 140007683. The reversal of 140007657 is 756700041.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140007657 - 2⁴ = 140007641 is a prime.

It is a super-3 number, since 3×140007657³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140007607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75088 + ... + 76929.

It is an arithmetic number, because the mean of its divisors is an integer number (23410772).

Almost surely, 2^140007657 is an apocalyptic number.

It is an amenable number.

140007657 is a deficient number, since it is larger than the sum of its proper divisors (47278519).

140007657 is a wasteful number, since it uses less digits than its factorization.

140007657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152327.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 140007657 is about 11832.4831290816. The cubic root of 140007657 is about 519.2588764238.

Adding to 140007657 its reverse (756700041), we get a palindrome (896707698).

The spelling of 140007657 in words is "one hundred forty million, seven thousand, six hundred fifty-seven".