4015993 has 2 divisors, whose sum is σ = 4015994. Its totient is φ = 4015992.

The previous prime is 4015987. The next prime is 4016003. The reversal of 4015993 is 3995104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2663424 + 1352569 = 1632^2 + 1163^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4015993 is a prime.

It is a super-2 number, since 2×4015993² = 32256399552098, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4015933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2007996 + 2007997.

It is an arithmetic number, because the mean of its divisors is an integer number (2007997).

Almost surely, 2^4015993 is an apocalyptic number.

It is an amenable number.

4015993 is a deficient number, since it is larger than the sum of its proper divisors (1).

4015993 is an equidigital number, since it uses as much as digits as its factorization.

4015993 is an evil number, because the sum of its binary digits is even.

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

The square root of 4015993 is about 2003.9942614688. The cubic root of 4015993 is about 158.9513847389.

The spelling of 4015993 in words is "four million, fifteen thousand, nine hundred ninety-three".