189450551 has 2 divisors, whose sum is σ = 189450552. Its totient is φ = 189450550.

The previous prime is 189450529. The next prime is 189450553. The reversal of 189450551 is 155054981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189450551 is a prime.

It is a super-2 number, since 2×189450551² = 71783022548407202, which contains 22 as substring.

Together with 189450553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189450553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94725275 + 94725276.

It is an arithmetic number, because the mean of its divisors is an integer number (94725276).

Almost surely, 2^189450551 is an apocalyptic number.

189450551 is a deficient number, since it is larger than the sum of its proper divisors (1).

189450551 is an equidigital number, since it uses as much as digits as its factorization.

189450551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 38.

The square root of 189450551 is about 13764.1037121928. The cubic root of 189450551 is about 574.3350104397.

The spelling of 189450551 in words is "one hundred eighty-nine million, four hundred fifty thousand, five hundred fifty-one".