189015641 has 2 divisors, whose sum is σ = 189015642. Its totient is φ = 189015640.

The previous prime is 189015613. The next prime is 189015677. The reversal of 189015641 is 146510981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132825625 + 56190016 = 11525^2 + 7496^2 .

It is a cyclic number.

It is not a de Polignac number, because 189015641 - 2²² = 184821337 is a prime.

It is not a weakly prime, because it can be changed into another prime (189015601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94507820 + 94507821.

It is an arithmetic number, because the mean of its divisors is an integer number (94507821).

Almost surely, 2^189015641 is an apocalyptic number.

It is an amenable number.

189015641 is a deficient number, since it is larger than the sum of its proper divisors (1).

189015641 is an equidigital number, since it uses as much as digits as its factorization.

189015641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 189015641 is about 13748.2959307690. The cubic root of 189015641 is about 573.8951851657.

It can be divided in two parts, 18901 and 5641, that added together give a palindrome (24542).

The spelling of 189015641 in words is "one hundred eighty-nine million, fifteen thousand, six hundred forty-one".