998740907 has 2 divisors, whose sum is σ = 998740908. Its totient is φ = 998740906.

The previous prime is 998740877. The next prime is 998740921. The reversal of 998740907 is 709047899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998740907 - 2⁶ = 998740843 is a prime.

It is not a weakly prime, because it can be changed into another prime (998740997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499370453 + 499370454.

It is an arithmetic number, because the mean of its divisors is an integer number (499370454).

Almost surely, 2^998740907 is an apocalyptic number.

998740907 is a deficient number, since it is larger than the sum of its proper divisors (1).

998740907 is an equidigital number, since it uses as much as digits as its factorization.

998740907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 998740907 is about 31602.8623228973. The cubic root of 998740907 is about 999.5801260639.

The spelling of 998740907 in words is "nine hundred ninety-eight million, seven hundred forty thousand, nine hundred seven".