140261791 has 2 divisors, whose sum is σ = 140261792. Its totient is φ = 140261790.

The previous prime is 140261789. The next prime is 140261809. The reversal of 140261791 is 197162041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140261791 - 2¹ = 140261789 is a prime.

Together with 140261789, it forms a pair of twin primes.

It is equal to p_7926124 and since 140261791 and 7926124 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140261761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70130895 + 70130896.

It is an arithmetic number, because the mean of its divisors is an integer number (70130896).

Almost surely, 2^140261791 is an apocalyptic number.

140261791 is a deficient number, since it is larger than the sum of its proper divisors (1).

140261791 is an equidigital number, since it uses as much as digits as its factorization.

140261791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 140261791 is about 11843.2170882746. The cubic root of 140261791 is about 519.5728629957.

The spelling of 140261791 in words is "one hundred forty million, two hundred sixty-one thousand, seven hundred ninety-one".