189213403 has 2 divisors, whose sum is σ = 189213404. Its totient is φ = 189213402.

The previous prime is 189213397. The next prime is 189213439. The reversal of 189213403 is 304312981.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189213403 is a prime.

It is not a weakly prime, because it can be changed into another prime (189213443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94606701 + 94606702.

It is an arithmetic number, because the mean of its divisors is an integer number (94606702).

Almost surely, 2^189213403 is an apocalyptic number.

189213403 is a deficient number, since it is larger than the sum of its proper divisors (1).

189213403 is an equidigital number, since it uses as much as digits as its factorization.

189213403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 189213403 is about 13755.4862872964. The cubic root of 189213403 is about 574.0952657867.

The spelling of 189213403 in words is "one hundred eighty-nine million, two hundred thirteen thousand, four hundred three".