140809577 has 4 divisors (see below), whose sum is σ = 143196240. Its totient is φ = 138422916.

The previous prime is 140809573. The next prime is 140809597. The reversal of 140809577 is 775908041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 775908041 = 1549 ⋅500909.

It is a cyclic number.

It is not a de Polignac number, because 140809577 - 2² = 140809573 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140809573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193243 + ... + 1193360.

It is an arithmetic number, because the mean of its divisors is an integer number (35799060).

Almost surely, 2^140809577 is an apocalyptic number.

It is an amenable number.

140809577 is a deficient number, since it is larger than the sum of its proper divisors (2386663).

140809577 is an equidigital number, since it uses as much as digits as its factorization.

140809577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386662.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 140809577 is about 11866.3211232462. The cubic root of 140809577 is about 520.2483737045.

The spelling of 140809577 in words is "one hundred forty million, eight hundred nine thousand, five hundred seventy-seven".