97787969 has 2 divisors, whose sum is σ = 97787970. Its totient is φ = 97787968.

The previous prime is 97787959. The next prime is 97787983. The reversal of 97787969 is 96978779.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71910400 + 25877569 = 8480^2 + 5087^2 .

It is an emirp because it is prime and its reverse (96978779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97787969 - 2¹⁶ = 97722433 is a prime.

It is a super-2 number, since 2×97787969² = 19124973762289922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97787909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48893984 + 48893985.

It is an arithmetic number, because the mean of its divisors is an integer number (48893985).

Almost surely, 2^97787969 is an apocalyptic number.

It is an amenable number.

97787969 is a deficient number, since it is larger than the sum of its proper divisors (1).

97787969 is an equidigital number, since it uses as much as digits as its factorization.

97787969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12002256, while the sum is 62.

The square root of 97787969 is about 9888.7799550804. The cubic root of 97787969 is about 460.7108872762.

The spelling of 97787969 in words is "ninety-seven million, seven hundred eighty-seven thousand, nine hundred sixty-nine".