97002781 has 2 divisors, whose sum is σ = 97002782. Its totient is φ = 97002780.

The previous prime is 97002779. The next prime is 97002803. The reversal of 97002781 is 18720079.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68326756 + 28676025 = 8266^2 + 5355^2 .

It is a cyclic number.

It is not a de Polignac number, because 97002781 - 2¹ = 97002779 is a prime.

It is a super-2 number, since 2×97002781² = 18819079043467922, which contains 22 as substring.

Together with 97002779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97002721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48501390 + 48501391.

It is an arithmetic number, because the mean of its divisors is an integer number (48501391).

Almost surely, 2^97002781 is an apocalyptic number.

It is an amenable number.

97002781 is a deficient number, since it is larger than the sum of its proper divisors (1).

97002781 is an equidigital number, since it uses as much as digits as its factorization.

97002781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 97002781 is about 9848.9989846684. The cubic root of 97002781 is about 459.4744801970.

The spelling of 97002781 in words is "ninety-seven million, two thousand, seven hundred eighty-one".