189471793457 has 2 divisors, whose sum is σ = 189471793458. Its totient is φ = 189471793456.

The previous prime is 189471793351. The next prime is 189471793463. The reversal of 189471793457 is 754397174981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123324582976 + 66147210481 = 351176^2 + 257191^2 .

It is a cyclic number.

It is not a de Polignac number, because 189471793457 - 2⁸ = 189471793201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189471793393 and 189471793402.

It is not a weakly prime, because it can be changed into another prime (189471793477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94735896728 + 94735896729.

It is an arithmetic number, because the mean of its divisors is an integer number (94735896729).

Almost surely, 2^189471793457 is an apocalyptic number.

It is an amenable number.

189471793457 is a deficient number, since it is larger than the sum of its proper divisors (1).

189471793457 is an equidigital number, since it uses as much as digits as its factorization.

189471793457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53343360, while the sum is 65.

The spelling of 189471793457 in words is "one hundred eighty-nine billion, four hundred seventy-one million, seven hundred ninety-three thousand, four hundred fifty-seven".