4011992531 has 2 divisors, whose sum is σ = 4011992532. Its totient is φ = 4011992530.

The previous prime is 4011992483. The next prime is 4011992533. The reversal of 4011992531 is 1352991104.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4011992531 is a prime.

It is a super-2 number, since 2×4011992531² = 32192168137599571922, which contains 22 as substring.

Together with 4011992533, 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 = 4011992491 and 4011992500.

It is not a weakly prime, because it can be changed into another prime (4011992533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2005996265 + 2005996266.

It is an arithmetic number, because the mean of its divisors is an integer number (2005996266).

Almost surely, 2^4011992531 is an apocalyptic number.

4011992531 is a deficient number, since it is larger than the sum of its proper divisors (1).

4011992531 is an equidigital number, since it uses as much as digits as its factorization.

4011992531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 4011992531 is about 63340.2915291681. The cubic root of 4011992531 is about 1588.9858822051.

The spelling of 4011992531 in words is "four billion, eleven million, nine hundred ninety-two thousand, five hundred thirty-one".