135439297 has 8 divisors (see below), whose sum is σ = 155188800. Its totient is φ = 115790064.

The previous prime is 135439253. The next prime is 135439307. The reversal of 135439297 is 792934531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135439297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135439247) 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, 22147 + ... + 27592.

It is an arithmetic number, because the mean of its divisors is an integer number (19398600).

Almost surely, 2^135439297 is an apocalyptic number.

It is an amenable number.

135439297 is a deficient number, since it is larger than the sum of its proper divisors (19749503).

135439297 is an equidigital number, since it uses as much as digits as its factorization.

135439297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50135.

The product of its digits is 204120, while the sum is 43.

The square root of 135439297 is about 11637.8390176183. The cubic root of 135439297 is about 513.5486165752.

The spelling of 135439297 in words is "one hundred thirty-five million, four hundred thirty-nine thousand, two hundred ninety-seven".