97144387927 has 2 divisors, whose sum is σ = 97144387928. Its totient is φ = 97144387926.

The previous prime is 97144387913. The next prime is 97144387931. The reversal of 97144387927 is 72978344179.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97144387927 - 2¹⁹ = 97143863639 is a prime.

It is a super-2 number, since 2×97144387927² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97144387127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48572193963 + 48572193964.

It is an arithmetic number, because the mean of its divisors is an integer number (48572193964).

Almost surely, 2^97144387927 is an apocalyptic number.

97144387927 is a deficient number, since it is larger than the sum of its proper divisors (1).

97144387927 is an equidigital number, since it uses as much as digits as its factorization.

97144387927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21337344, while the sum is 61.

The spelling of 97144387927 in words is "ninety-seven billion, one hundred forty-four million, three hundred eighty-seven thousand, nine hundred twenty-seven".