97778029 has 2 divisors, whose sum is σ = 97778030. Its totient is φ = 97778028.

The previous prime is 97777997. The next prime is 97778039. The reversal of 97778029 is 92087779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88322404 + 9455625 = 9398^2 + 3075^2 .

It is a cyclic number.

It is not a de Polignac number, because 97778029 - 2⁵ = 97777997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97778039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48889014 + 48889015.

It is an arithmetic number, because the mean of its divisors is an integer number (48889015).

Almost surely, 2^97778029 is an apocalyptic number.

It is an amenable number.

97778029 is a deficient number, since it is larger than the sum of its proper divisors (1).

97778029 is an equidigital number, since it uses as much as digits as its factorization.

97778029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 97778029 is about 9888.2773525018. The cubic root of 97778029 is about 460.6952765577.

The spelling of 97778029 in words is "ninety-seven million, seven hundred seventy-eight thousand, twenty-nine".