140202137 has 4 divisors (see below), whose sum is σ = 140372496. Its totient is φ = 140031780.

The previous prime is 140202133. The next prime is 140202143. The reversal of 140202137 is 731202041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 731202041 = 829 ⋅882029.

It is a cyclic number.

It is not a de Polignac number, because 140202137 - 2² = 140202133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140202133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83939 + ... + 85592.

It is an arithmetic number, because the mean of its divisors is an integer number (35093124).

Almost surely, 2^140202137 is an apocalyptic number.

It is an amenable number.

140202137 is a deficient number, since it is larger than the sum of its proper divisors (170359).

140202137 is an equidigital number, since it uses as much as digits as its factorization.

140202137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170358.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 140202137 is about 11840.6983324464. The cubic root of 140202137 is about 519.4991936226.

Adding to 140202137 its reverse (731202041), we get a palindrome (871404178).

The spelling of 140202137 in words is "one hundred forty million, two hundred two thousand, one hundred thirty-seven".