140197523 has 16 divisors (see below), whose sum is σ = 151257600. Its totient is φ = 129548160.

The previous prime is 140197493. The next prime is 140197537. The reversal of 140197523 is 325791041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140197523 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140197523.

It is not an unprimeable number, because it can be changed into a prime (140197423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138443 + ... + 139451.

It is an arithmetic number, because the mean of its divisors is an integer number (9453600).

Almost surely, 2^140197523 is an apocalyptic number.

140197523 is a deficient number, since it is larger than the sum of its proper divisors (11060077).

140197523 is a wasteful number, since it uses less digits than its factorization.

140197523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 140197523 is about 11840.5034943621. The cubic root of 140197523 is about 519.4934947185.

The spelling of 140197523 in words is "one hundred forty million, one hundred ninety-seven thousand, five hundred twenty-three".