97028147891 has 2 divisors, whose sum is σ = 97028147892. Its totient is φ = 97028147890.

The previous prime is 97028147869. The next prime is 97028147911. The reversal of 97028147891 is 19874182079.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97028147891 - 2¹⁴ = 97028131507 is a prime.

It is a super-2 number, since 2×97028147891² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97028147851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48514073945 + 48514073946.

It is an arithmetic number, because the mean of its divisors is an integer number (48514073946).

Almost surely, 2^97028147891 is an apocalyptic number.

97028147891 is a deficient number, since it is larger than the sum of its proper divisors (1).

97028147891 is an equidigital number, since it uses as much as digits as its factorization.

97028147891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The spelling of 97028147891 in words is "ninety-seven billion, twenty-eight million, one hundred forty-seven thousand, eight hundred ninety-one".