135977197 has 4 divisors (see below), whose sum is σ = 139293756. Its totient is φ = 132660640.

The previous prime is 135977189. The next prime is 135977207. The reversal of 135977197 is 791779531.

135977197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70997476 + 64979721 = 8426^2 + 8061^2 .

It is a cyclic number.

It is not a de Polignac number, because 135977197 - 2³ = 135977189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135977197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135977147) 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, 1658218 + ... + 1658299.

It is an arithmetic number, because the mean of its divisors is an integer number (34823439).

Almost surely, 2^135977197 is an apocalyptic number.

It is an amenable number.

135977197 is a deficient number, since it is larger than the sum of its proper divisors (3316559).

135977197 is an equidigital number, since it uses as much as digits as its factorization.

135977197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316558.

The product of its digits is 416745, while the sum is 49.

The square root of 135977197 is about 11660.9260781466. The cubic root of 135977197 is about 514.2275748908.

The spelling of 135977197 in words is "one hundred thirty-five million, nine hundred seventy-seven thousand, one hundred ninety-seven".