189642007 has 2 divisors, whose sum is σ = 189642008. Its totient is φ = 189642006.

The previous prime is 189641951. The next prime is 189642017. The reversal of 189642007 is 700246981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189642007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189642017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94821003 + 94821004.

It is an arithmetic number, because the mean of its divisors is an integer number (94821004).

Almost surely, 2^189642007 is an apocalyptic number.

189642007 is a deficient number, since it is larger than the sum of its proper divisors (1).

189642007 is an equidigital number, since it uses as much as digits as its factorization.

189642007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 189642007 is about 13771.0568584986. The cubic root of 189642007 is about 574.5284168681.

Adding to 189642007 its reverse (700246981), we get a palindrome (889888988).

The spelling of 189642007 in words is "one hundred eighty-nine million, six hundred forty-two thousand, seven".