135747890 has 16 divisors (see below), whose sum is σ = 258719832. Its totient is φ = 51105024.

The previous prime is 135747881. The next prime is 135747971. The reversal of 135747890 is 98747531.

It can be written as a sum of positive squares in 4 ways, for example, as 99181681 + 36566209 = 9959^2 + 6047^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399089 + ... + 399428.

Almost surely, 2^135747890 is an apocalyptic number.

135747890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135747890 is a deficient number, since it is larger than the sum of its proper divisors (122971942).

135747890 is a wasteful number, since it uses less digits than its factorization.

135747890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798541.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 135747890 is about 11651.0896486123. The cubic root of 135747890 is about 513.9383540254.

The spelling of 135747890 in words is "one hundred thirty-five million, seven hundred forty-seven thousand, eight hundred ninety".