1008723491 has 2 divisors, whose sum is σ = 1008723492. Its totient is φ = 1008723490.

The previous prime is 1008723479. The next prime is 1008723497. The reversal of 1008723491 is 1943278001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1008723491 - 2⁶ = 1008723427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1008723497) 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, 504361745 + 504361746.

It is an arithmetic number, because the mean of its divisors is an integer number (504361746).

Almost surely, 2^1008723491 is an apocalyptic number.

1008723491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1008723491 is an equidigital number, since it uses as much as digits as its factorization.

1008723491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1008723491 is about 31760.4076012887. The cubic root of 1008723491 is about 1002.8994155978.

The spelling of 1008723491 in words is "one billion, eight million, seven hundred twenty-three thousand, four hundred ninety-one".