1203116581 has 2 divisors, whose sum is σ = 1203116582. Its totient is φ = 1203116580.

The previous prime is 1203116573. The next prime is 1203116609. The reversal of 1203116581 is 1856113021.

It is an a-pointer prime, because the next prime (1203116609) can be obtained adding 1203116581 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 705380481 + 497736100 = 26559^2 + 22310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203116581 - 2³ = 1203116573 is a prime.

It is a super-2 number, since 2×1203116581² = 2894979014954259122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203116561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601558290 + 601558291.

It is an arithmetic number, because the mean of its divisors is an integer number (601558291).

Almost surely, 2^1203116581 is an apocalyptic number.

It is an amenable number.

1203116581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203116581 is an equidigital number, since it uses as much as digits as its factorization.

1203116581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1203116581 is about 34685.9709536867. The cubic root of 1203116581 is about 1063.5777354330.

The spelling of 1203116581 in words is "one billion, two hundred three million, one hundred sixteen thousand, five hundred eighty-one".