189025779479 has 2 divisors, whose sum is σ = 189025779480. Its totient is φ = 189025779478.

The previous prime is 189025779461. The next prime is 189025779491. The reversal of 189025779479 is 974977520981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189025779479 - 2⁸ = 189025779223 is a prime.

It is a super-2 number, since 2×189025779479² (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 (189025779419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94512889739 + 94512889740.

It is an arithmetic number, because the mean of its divisors is an integer number (94512889740).

Almost surely, 2^189025779479 is an apocalyptic number.

189025779479 is a deficient number, since it is larger than the sum of its proper divisors (1).

189025779479 is an equidigital number, since it uses as much as digits as its factorization.

189025779479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80015040, while the sum is 68.

The spelling of 189025779479 in words is "one hundred eighty-nine billion, twenty-five million, seven hundred seventy-nine thousand, four hundred seventy-nine".