140740991 has 2 divisors, whose sum is σ = 140740992. Its totient is φ = 140740990.

The previous prime is 140740981. The next prime is 140740993. The reversal of 140740991 is 199047041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140740991 - 2¹⁴ = 140724607 is a prime.

Together with 140740993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140740993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70370495 + 70370496.

It is an arithmetic number, because the mean of its divisors is an integer number (70370496).

Almost surely, 2^140740991 is an apocalyptic number.

140740991 is a deficient number, since it is larger than the sum of its proper divisors (1).

140740991 is an equidigital number, since it uses as much as digits as its factorization.

140740991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 140740991 is about 11863.4308275473. The cubic root of 140740991 is about 520.1638918801.

The spelling of 140740991 in words is "one hundred forty million, seven hundred forty thousand, nine hundred ninety-one".