136949719 has 4 divisors (see below), whose sum is σ = 137100960. Its totient is φ = 136798480.

The previous prime is 136949677. The next prime is 136949749. The reversal of 136949719 is 917949631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 917949631 = 25447 ⋅36073.

It is a cyclic number.

It is not a de Polignac number, because 136949719 - 2¹³ = 136941527 is a prime.

It is a super-2 number, since 2×136949719² = 37510451068357922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136949749) 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, 74254 + ... + 76075.

It is an arithmetic number, because the mean of its divisors is an integer number (34275240).

Almost surely, 2^136949719 is an apocalyptic number.

136949719 is a deficient number, since it is larger than the sum of its proper divisors (151241).

136949719 is an equidigital number, since it uses as much as digits as its factorization.

136949719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151240.

The product of its digits is 367416, while the sum is 49.

The square root of 136949719 is about 11702.5518157366. The cubic root of 136949719 is about 515.4505988159.

The spelling of 136949719 in words is "one hundred thirty-six million, nine hundred forty-nine thousand, seven hundred nineteen".