103631491 has 8 divisors (see below), whose sum is σ = 113829120. Its totient is φ = 93908232.

The previous prime is 103631467. The next prime is 103631501. The reversal of 103631491 is 194136301.

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 103631491 - 2¹⁹ = 103107203 is a prime.

It is a super-3 number, since 3×103631491³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103631291) 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, 118135 + ... + 119008.

It is an arithmetic number, because the mean of its divisors is an integer number (14228640).

Almost surely, 2^103631491 is an apocalyptic number.

103631491 is a deficient number, since it is larger than the sum of its proper divisors (10197629).

103631491 is a wasteful number, since it uses less digits than its factorization.

103631491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237185.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 103631491 is about 10179.9553535367. The cubic root of 103631491 is about 469.7108391859.

Adding to 103631491 its reverse (194136301), we get a palindrome (297767792).

The spelling of 103631491 in words is "one hundred three million, six hundred thirty-one thousand, four hundred ninety-one".