135868724 has 12 divisors (see below), whose sum is σ = 241119648. Its totient is φ = 66977400.

The previous prime is 135868721. The next prime is 135868727. The reversal of 135868724 is 427868531.

It is an interprime number because it is at equal distance from previous prime (135868721) and next prime (135868727).

It is a super-2 number, since 2×135868724² = 36920620322776352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135868721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238922 + ... + 239489.

It is an arithmetic number, because the mean of its divisors is an integer number (20093304).

Almost surely, 2^135868724 is an apocalyptic number.

It is an amenable number.

135868724 is a deficient number, since it is larger than the sum of its proper divisors (105250924).

135868724 is a wasteful number, since it uses less digits than its factorization.

135868724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478486 (or 478484 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The square root of 135868724 is about 11656.2740187420. The cubic root of 135868724 is about 514.0908003728.

The spelling of 135868724 in words is "one hundred thirty-five million, eight hundred sixty-eight thousand, seven hundred twenty-four".