1008145991 has 2 divisors, whose sum is σ = 1008145992. Its totient is φ = 1008145990.

The previous prime is 1008145961. The next prime is 1008146003. The reversal of 1008145991 is 1995418001.

1008145991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1008145991 - 2¹⁸ = 1007883847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1008145961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504072995 + 504072996.

It is an arithmetic number, because the mean of its divisors is an integer number (504072996).

Almost surely, 2^1008145991 is an apocalyptic number.

1008145991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1008145991 is an equidigital number, since it uses as much as digits as its factorization.

1008145991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 1008145991 is about 31751.3147916744. The cubic root of 1008145991 is about 1002.7079905014.

The spelling of 1008145991 in words is "one billion, eight million, one hundred forty-five thousand, nine hundred ninety-one".