135377993 has 4 divisors (see below), whose sum is σ = 136274688. Its totient is φ = 134481300.

The previous prime is 135377951. The next prime is 135378011. The reversal of 135377993 is 399773531.

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, and also an emirpimes, since its reverse is a distinct semiprime: 399773531 = 863 ⋅463237.

It is a cyclic number.

It is not a de Polignac number, because 135377993 - 2⁶ = 135377929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135377903) 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, 448121 + ... + 448422.

It is an arithmetic number, because the mean of its divisors is an integer number (34068672).

Almost surely, 2^135377993 is an apocalyptic number.

It is an amenable number.

135377993 is a deficient number, since it is larger than the sum of its proper divisors (896695).

135377993 is an equidigital number, since it uses as much as digits as its factorization.

135377993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896694.

The product of its digits is 535815, while the sum is 47.

The square root of 135377993 is about 11635.2048972074. The cubic root of 135377993 is about 513.4711222382.

The spelling of 135377993 in words is "one hundred thirty-five million, three hundred seventy-seven thousand, nine hundred ninety-three".