140197537 has 2 divisors, whose sum is σ = 140197538. Its totient is φ = 140197536.

The previous prime is 140197493. The next prime is 140197559. The reversal of 140197537 is 735791041.

140197537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70157376 + 70040161 = 8376^2 + 8369^2 .

It is an emirp because it is prime and its reverse (735791041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140197537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140197496 and 140197505.

It is not a weakly prime, because it can be changed into another prime (140197037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70098768 + 70098769.

It is an arithmetic number, because the mean of its divisors is an integer number (70098769).

Almost surely, 2^140197537 is an apocalyptic number.

It is an amenable number.

140197537 is a deficient number, since it is larger than the sum of its proper divisors (1).

140197537 is an equidigital number, since it uses as much as digits as its factorization.

140197537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 140197537 is about 11840.5040855531. The cubic root of 140197537 is about 519.4935120106.

The spelling of 140197537 in words is "one hundred forty million, one hundred ninety-seven thousand, five hundred thirty-seven".