140777691 has 16 divisors (see below), whose sum is σ = 191216928. Its totient is φ = 92102400.

The previous prime is 140777683. The next prime is 140777701. The reversal of 140777691 is 196777041.

It is not a de Polignac number, because 140777691 - 2³ = 140777683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140777191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149775 + ... + 150711.

It is an arithmetic number, because the mean of its divisors is an integer number (11951058).

Almost surely, 2^140777691 is an apocalyptic number.

140777691 is a deficient number, since it is larger than the sum of its proper divisors (50439237).

140777691 is an equidigital number, since it uses as much as digits as its factorization.

140777691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 140777691 is about 11864.9774968181. The cubic root of 140777691 is about 520.2091010633.

The spelling of 140777691 in words is "one hundred forty million, seven hundred seventy-seven thousand, six hundred ninety-one".