135939690 has 36 divisors (see below), whose sum is σ = 353731014. Its totient is φ = 36221088.

The previous prime is 135939673. The next prime is 135939707. The reversal of 135939690 is 96939531.

It is an interprime number because it is at equal distance from previous prime (135939673) and next prime (135939707).

It can be written as a sum of positive squares in 3 ways, for example, as 130165281 + 5774409 = 11409^2 + 2403^2 .

It is a super-3 number, since 3×135939690³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 109996 + ... + 111224.

Almost surely, 2^135939690 is an apocalyptic number.

135939690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135939690 is an abundant number, since it is smaller than the sum of its proper divisors (217791324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135939690 is an equidigital number, since it uses as much as digits as its factorization.

135939690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 196830, while the sum is 45.

The square root of 135939690 is about 11659.3177330408. The cubic root of 135939690 is about 514.1802902291.

The spelling of 135939690 in words is "one hundred thirty-five million, nine hundred thirty-nine thousand, six hundred ninety".