189155077 has 4 divisors (see below), whose sum is σ = 189280800. Its totient is φ = 189029356.

The previous prime is 189155069. The next prime is 189155093. The reversal of 189155077 is 770551981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 770551981 = 47 ⋅16394723.

It is a cyclic number.

It is not a de Polignac number, because 189155077 - 2³ = 189155069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189155027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60577 + ... + 63622.

It is an arithmetic number, because the mean of its divisors is an integer number (47320200).

Almost surely, 2^189155077 is an apocalyptic number.

It is an amenable number.

189155077 is a deficient number, since it is larger than the sum of its proper divisors (125723).

189155077 is a wasteful number, since it uses less digits than its factorization.

189155077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125722.

The product of its (nonzero) digits is 88200, while the sum is 43.

The square root of 189155077 is about 13753.3660243593. The cubic root of 189155077 is about 574.0362704563.

The spelling of 189155077 in words is "one hundred eighty-nine million, one hundred fifty-five thousand, seventy-seven".