135997057 has 8 divisors (see below), whose sum is σ = 155503232. Its totient is φ = 116510400.

The previous prime is 135997051. The next prime is 135997087. The reversal of 135997057 is 750799531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135997057 - 2⁷ = 135996929 is a prime.

It is a super-2 number, since 2×135997057² = 36990399025322498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135996998 and 135997016.

It is not an unprimeable number, because it can be changed into a prime (135997051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16057 + ... + 23017.

It is an arithmetic number, because the mean of its divisors is an integer number (19437904).

Almost surely, 2^135997057 is an apocalyptic number.

It is an amenable number.

135997057 is a deficient number, since it is larger than the sum of its proper divisors (19506175).

135997057 is an equidigital number, since it uses as much as digits as its factorization.

135997057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9759.

The product of its (nonzero) digits is 297675, while the sum is 46.

The square root of 135997057 is about 11661.7776089239. Note that the first 3 decimals coincide. The cubic root of 135997057 is about 514.2526086531.

The spelling of 135997057 in words is "one hundred thirty-five million, nine hundred ninety-seven thousand, fifty-seven".