7631491 has 4 divisors (see below), whose sum is σ = 8721712. Its totient is φ = 6541272.

The previous prime is 7631489. The next prime is 7631537. The reversal of 7631491 is 1941367.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7631491 - 2¹ = 7631489 is a prime.

It is a super-3 number, since 3×7631491³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7631401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545100 + ... + 545113.

It is an arithmetic number, because the mean of its divisors is an integer number (2180428).

Almost surely, 2^7631491 is an apocalyptic number.

7631491 is a deficient number, since it is larger than the sum of its proper divisors (1090221).

7631491 is a wasteful number, since it uses less digits than its factorization.

7631491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090220.

The product of its digits is 4536, while the sum is 31.

The square root of 7631491 is about 2762.5153393239. The cubic root of 7631491 is about 196.8806942504.

The spelling of 7631491 in words is "seven million, six hundred thirty-one thousand, four hundred ninety-one".