6961531 has 2 divisors, whose sum is σ = 6961532. Its totient is φ = 6961530.

The previous prime is 6961529. The next prime is 6961541. The reversal of 6961531 is 1351696.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6961531 - 2¹ = 6961529 is a prime.

It is a super-2 number, since 2×6961531² = 96925827727922, which contains 22 as substring.

Together with 6961529, it forms a pair of twin primes.

It is a Chen prime.

6961531 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6961493 and 6961502.

It is not a weakly prime, because it can be changed into another prime (6961511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3480765 + 3480766.

It is an arithmetic number, because the mean of its divisors is an integer number (3480766).

Almost surely, 2^6961531 is an apocalyptic number.

6961531 is a deficient number, since it is larger than the sum of its proper divisors (1).

6961531 is an equidigital number, since it uses as much as digits as its factorization.

6961531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 31.

The square root of 6961531 is about 2638.4713377257. The cubic root of 6961531 is about 190.9420527227.

The spelling of 6961531 in words is "six million, nine hundred sixty-one thousand, five hundred thirty-one".