981996097 has 2 divisors, whose sum is σ = 981996098. Its totient is φ = 981996096.

The previous prime is 981996091. The next prime is 981996107. The reversal of 981996097 is 790699189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 629457921 + 352538176 = 25089^2 + 18776^2 .

It is a cyclic number.

It is not a de Polignac number, because 981996097 - 2³ = 981996089 is a prime.

It is not a weakly prime, because it can be changed into another prime (981996091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490998048 + 490998049.

It is an arithmetic number, because the mean of its divisors is an integer number (490998049).

Almost surely, 2^981996097 is an apocalyptic number.

It is an amenable number.

981996097 is a deficient number, since it is larger than the sum of its proper divisors (1).

981996097 is an equidigital number, since it uses as much as digits as its factorization.

981996097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 58.

The square root of 981996097 is about 31336.8169570555. The cubic root of 981996097 is about 993.9623187704.

The spelling of 981996097 in words is "nine hundred eighty-one million, nine hundred ninety-six thousand, ninety-seven".