97027781 has 2 divisors, whose sum is σ = 97027782. Its totient is φ = 97027780.

The previous prime is 97027769. The next prime is 97027807. The reversal of 97027781 is 18772079.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81739681 + 15288100 = 9041^2 + 3910^2 .

It is a cyclic number.

It is not a de Polignac number, because 97027781 - 2¹⁰ = 97026757 is a prime.

It is a super-2 number, since 2×97027781² = 18828780571567922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97027741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48513890 + 48513891.

It is an arithmetic number, because the mean of its divisors is an integer number (48513891).

Almost surely, 2^97027781 is an apocalyptic number.

It is an amenable number.

97027781 is a deficient number, since it is larger than the sum of its proper divisors (1).

97027781 is an equidigital number, since it uses as much as digits as its factorization.

97027781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 97027781 is about 9850.2680674183. The cubic root of 97027781 is about 459.5139494274.

The spelling of 97027781 in words is "ninety-seven million, twenty-seven thousand, seven hundred eighty-one".