97978747 has 2 divisors, whose sum is σ = 97978748. Its totient is φ = 97978746.

The previous prime is 97978729. The next prime is 97978757. The reversal of 97978747 is 74787979.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97978747 - 2⁷ = 97978619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97978691 and 97978700.

It is not a weakly prime, because it can be changed into another prime (97978717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48989373 + 48989374.

It is an arithmetic number, because the mean of its divisors is an integer number (48989374).

Almost surely, 2^97978747 is an apocalyptic number.

97978747 is a deficient number, since it is larger than the sum of its proper divisors (1).

97978747 is an equidigital number, since it uses as much as digits as its factorization.

97978747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6223392, while the sum is 58.

The square root of 97978747 is about 9898.4214398054. The cubic root of 97978747 is about 461.0102983600.

The spelling of 97978747 in words is "ninety-seven million, nine hundred seventy-eight thousand, seven hundred forty-seven".