135687377 has 4 divisors (see below), whose sum is σ = 155071296. Its totient is φ = 116303460.

The previous prime is 135687347. The next prime is 135687389. The reversal of 135687377 is 773786531.

It is a happy number.

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.

It is not a de Polignac number, because 135687377 - 2⁸ = 135687121 is a prime.

It is a super-2 number, since 2×135687377² = 36822128554280258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135687347) 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, 9691949 + ... + 9691962.

It is an arithmetic number, because the mean of its divisors is an integer number (38767824).

Almost surely, 2^135687377 is an apocalyptic number.

It is an amenable number.

135687377 is a deficient number, since it is larger than the sum of its proper divisors (19383919).

135687377 is an equidigital number, since it uses as much as digits as its factorization.

135687377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19383918.

The product of its digits is 740880, while the sum is 47.

The square root of 135687377 is about 11648.4924775698. The cubic root of 135687377 is about 513.8619757383.

The spelling of 135687377 in words is "one hundred thirty-five million, six hundred eighty-seven thousand, three hundred seventy-seven".