74135631 has 8 divisors (see below), whose sum is σ = 99350064. Its totient is φ = 49172480.

The previous prime is 74135617. The next prime is 74135639. The reversal of 74135631 is 13653147.

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 74135631 - 2¹³ = 74127439 is a prime.

It is a super-3 number, since 3×74135631³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74135639) 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, 62130 + ... + 63311.

It is an arithmetic number, because the mean of its divisors is an integer number (12418758).

Almost surely, 2^74135631 is an apocalyptic number.

74135631 is a deficient number, since it is larger than the sum of its proper divisors (25214433).

74135631 is a wasteful number, since it uses less digits than its factorization.

74135631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125641.

The product of its digits is 7560, while the sum is 30.

The square root of 74135631 is about 8610.2050498231. The cubic root of 74135631 is about 420.0899863877.

Adding to 74135631 its reverse (13653147), we get a palindrome (87788778).

The spelling of 74135631 in words is "seventy-four million, one hundred thirty-five thousand, six hundred thirty-one".