11949731 has 2 divisors, whose sum is σ = 11949732. Its totient is φ = 11949730.

The previous prime is 11949713. The next prime is 11949733. The reversal of 11949731 is 13794911.

It is a happy number.

Together with previous prime (11949713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11949731 - 2¹⁸ = 11687587 is a prime.

It is a super-2 number, since 2×11949731² = 285592141944722, which contains 22 as substring.

Together with 11949733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11949691 and 11949700.

It is not a weakly prime, because it can be changed into another prime (11949733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5974865 + 5974866.

It is an arithmetic number, because the mean of its divisors is an integer number (5974866).

Almost surely, 2^11949731 is an apocalyptic number.

11949731 is a deficient number, since it is larger than the sum of its proper divisors (1).

11949731 is an equidigital number, since it uses as much as digits as its factorization.

11949731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 35.

The square root of 11949731 is about 3456.8382953213. The cubic root of 11949731 is about 228.6227141802.

The spelling of 11949731 in words is "eleven million, nine hundred forty-nine thousand, seven hundred thirty-one".