97788451 has 2 divisors, whose sum is σ = 97788452. Its totient is φ = 97788450.

The previous prime is 97788419. The next prime is 97788499. The reversal of 97788451 is 15488779.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97788451 - 2⁵ = 97788419 is a prime.

It is a super-2 number, since 2×97788451² = 19125162297958802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 97788395 and 97788404.

It is not a weakly prime, because it can be changed into another prime (97788851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48894225 + 48894226.

It is an arithmetic number, because the mean of its divisors is an integer number (48894226).

Almost surely, 2^97788451 is an apocalyptic number.

97788451 is a deficient number, since it is larger than the sum of its proper divisors (1).

97788451 is an equidigital number, since it uses as much as digits as its factorization.

97788451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 49.

The square root of 97788451 is about 9888.8043261054. The cubic root of 97788451 is about 460.7116442278.

The spelling of 97788451 in words is "ninety-seven million, seven hundred eighty-eight thousand, four hundred fifty-one".