97928939 has 2 divisors, whose sum is σ = 97928940. Its totient is φ = 97928938.

The previous prime is 97928927. The next prime is 97928977. The reversal of 97928939 is 93982979.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97928939 - 2⁴ = 97928923 is a prime.

It is not a weakly prime, because it can be changed into another prime (97921939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48964469 + 48964470.

It is an arithmetic number, because the mean of its divisors is an integer number (48964470).

Almost surely, 2^97928939 is an apocalyptic number.

97928939 is a deficient number, since it is larger than the sum of its proper divisors (1).

97928939 is an equidigital number, since it uses as much as digits as its factorization.

97928939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 56.

The square root of 97928939 is about 9895.9051632481. The cubic root of 97928939 is about 460.9321661334.

The spelling of 97928939 in words is "ninety-seven million, nine hundred twenty-eight thousand, nine hundred thirty-nine".