270138749 has 8 divisors (see below), whose sum is σ = 283364352. Its totient is φ = 257036560.

The previous prime is 270138691. The next prime is 270138761. The reversal of 270138749 is 947831072.

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-270138749 is a prime.

It is a super-2 number, since 2×270138749² = 145949887422570002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (270138149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26354 + ... + 35139.

It is an arithmetic number, because the mean of its divisors is an integer number (35420544).

Almost surely, 2^270138749 is an apocalyptic number.

It is an amenable number.

270138749 is a deficient number, since it is larger than the sum of its proper divisors (13225603).

270138749 is a wasteful number, since it uses less digits than its factorization.

270138749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61707.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 270138749 is about 16435.8981805072. The cubic root of 270138749 is about 646.4411012573.

The spelling of 270138749 in words is "two hundred seventy million, one hundred thirty-eight thousand, seven hundred forty-nine".