7131969 has 30 divisors (see below), whose sum is σ = 11558646. Its totient is φ = 4380480.

The previous prime is 7131967. The next prime is 7131977. The reversal of 7131969 is 9691317.

It can be written as a sum of positive squares in 3 ways, for example, as 82944 + 7049025 = 288^2 + 2655^2 .

It is not a de Polignac number, because 7131969 - 2¹ = 7131967 is a prime.

It is a super-2 number, since 2×7131969² = 101729963633922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7131967) 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 29 ways as a sum of consecutive naturals, for example, 13429 + ... + 13949.

Almost surely, 2^7131969 is an apocalyptic number.

It is an amenable number.

7131969 is a deficient number, since it is larger than the sum of its proper divisors (4426677).

7131969 is a wasteful number, since it uses less digits than its factorization.

7131969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 537 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 7131969 is about 2670.5746572601. The cubic root of 7131969 is about 192.4877734406.

It can be divided in two parts, 7131 and 969, that added together give a square (8100 = 90²).

The spelling of 7131969 in words is "seven million, one hundred thirty-one thousand, nine hundred sixty-nine".