135720537 has 32 divisors (see below), whose sum is σ = 200600064. Its totient is φ = 81254400.

The previous prime is 135720523. The next prime is 135720583. The reversal of 135720537 is 735027531.

135720537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135720537 - 2¹⁰ = 135719513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135720498 and 135720507.

It is not an unprimeable number, because it can be changed into a prime (135720517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97587 + ... + 98967.

It is an arithmetic number, because the mean of its divisors is an integer number (6268752).

Almost surely, 2^135720537 is an apocalyptic number.

135720537 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

135720537 is a deficient number, since it is larger than the sum of its proper divisors (64879527).

135720537 is a wasteful number, since it uses less digits than its factorization.

135720537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489.

The product of its (nonzero) digits is 22050, while the sum is 33.

The square root of 135720537 is about 11649.9157507683. The cubic root of 135720537 is about 513.9038324327.

The spelling of 135720537 in words is "one hundred thirty-five million, seven hundred twenty thousand, five hundred thirty-seven".