135903951 has 24 divisors (see below), whose sum is σ = 203339136. Its totient is φ = 87408720.

The previous prime is 135903919. The next prime is 135903961. The reversal of 135903951 is 159309531.

135903951 is a `hidden beast` number, since 13 + 590 + 3 + 9 + 51 = 666.

It is not a de Polignac number, because 135903951 - 2⁵ = 135903919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135903961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30006 + ... + 34236.

It is an arithmetic number, because the mean of its divisors is an integer number (8472464).

Almost surely, 2^135903951 is an apocalyptic number.

135903951 is a deficient number, since it is larger than the sum of its proper divisors (67435185).

135903951 is a wasteful number, since it uses less digits than its factorization.

135903951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363 (or 4360 counting only the distinct ones).

The product of its (nonzero) digits is 18225, while the sum is 36.

The square root of 135903951 is about 11657.7849954440. The cubic root of 135903951 is about 514.1352263727.

The spelling of 135903951 in words is "one hundred thirty-five million, nine hundred three thousand, nine hundred fifty-one".