1008997901 has 2 divisors, whose sum is σ = 1008997902. Its totient is φ = 1008997900.

The previous prime is 1008997867. The next prime is 1008997921. The reversal of 1008997901 is 1097998001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 641355625 + 367642276 = 25325^2 + 19174^2 .

It is an emirp because it is prime and its reverse (1097998001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1008997901 - 2⁶ = 1008997837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1008997921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504498950 + 504498951.

It is an arithmetic number, because the mean of its divisors is an integer number (504498951).

Almost surely, 2^1008997901 is an apocalyptic number.

It is an amenable number.

1008997901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1008997901 is an equidigital number, since it uses as much as digits as its factorization.

1008997901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 1008997901 is about 31764.7273087618. The cubic root of 1008997901 is about 1002.9903492314.

The spelling of 1008997901 in words is "one billion, eight million, nine hundred ninety-seven thousand, nine hundred one".