140535691 has 2 divisors, whose sum is σ = 140535692. Its totient is φ = 140535690.

The previous prime is 140535671. The next prime is 140535709. The reversal of 140535691 is 196535041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140535691 - 2¹¹ = 140533643 is a prime.

It is equal to p_7940662 and since 140535691 and 7940662 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (140535601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70267845 + 70267846.

It is an arithmetic number, because the mean of its divisors is an integer number (70267846).

Almost surely, 2^140535691 is an apocalyptic number.

140535691 is a deficient number, since it is larger than the sum of its proper divisors (1).

140535691 is an equidigital number, since it uses as much as digits as its factorization.

140535691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 140535691 is about 11854.7750294976. The cubic root of 140535691 is about 519.9108464019.

The spelling of 140535691 in words is "one hundred forty million, five hundred thirty-five thousand, six hundred ninety-one".