1041599981 has 2 divisors, whose sum is σ = 1041599982. Its totient is φ = 1041599980.

The previous prime is 1041599941. The next prime is 1041600037. The reversal of 1041599981 is 1899951401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 808549225 + 233050756 = 28435^2 + 15266^2 .

It is an emirp because it is prime and its reverse (1899951401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1041599981 - 2¹⁴ = 1041583597 is a prime.

It is a super-2 number, since 2×1041599981² = 2169861040838400722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1041599941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520799990 + 520799991.

It is an arithmetic number, because the mean of its divisors is an integer number (520799991).

Almost surely, 2^1041599981 is an apocalyptic number.

It is an amenable number.

1041599981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1041599981 is an equidigital number, since it uses as much as digits as its factorization.

1041599981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 47.

The square root of 1041599981 is about 32273.8281119547. The cubic root of 1041599981 is about 1013.6787003635.

The spelling of 1041599981 in words is "one billion, forty-one million, five hundred ninety-nine thousand, nine hundred eighty-one".