140387557 has 4 divisors (see below), whose sum is σ = 140422176. Its totient is φ = 140352940.

The previous prime is 140387551. The next prime is 140387573. The reversal of 140387557 is 755783041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140387557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140387551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10273 + ... + 19654.

It is an arithmetic number, because the mean of its divisors is an integer number (35105544).

Almost surely, 2^140387557 is an apocalyptic number.

It is an amenable number.

140387557 is a deficient number, since it is larger than the sum of its proper divisors (34619).

140387557 is an equidigital number, since it uses as much as digits as its factorization.

140387557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34618.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 140387557 is about 11848.5255200805. The cubic root of 140387557 is about 519.7281086011.

The spelling of 140387557 in words is "one hundred forty million, three hundred eighty-seven thousand, five hundred fifty-seven".