919489201 has 2 divisors, whose sum is σ = 919489202. Its totient is φ = 919489200.

The previous prime is 919489187. The next prime is 919489213. The reversal of 919489201 is 102984919.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783160225 + 136328976 = 27985^2 + 11676^2 .

It is an emirp because it is prime and its reverse (102984919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 919489201 - 2⁷ = 919489073 is a prime.

It is not a weakly prime, because it can be changed into another prime (919489601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459744600 + 459744601.

It is an arithmetic number, because the mean of its divisors is an integer number (459744601).

Almost surely, 2^919489201 is an apocalyptic number.

It is an amenable number.

919489201 is a deficient number, since it is larger than the sum of its proper divisors (1).

919489201 is an equidigital number, since it uses as much as digits as its factorization.

919489201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 919489201 is about 30323.0803349528. The cubic root of 919489201 is about 972.4087938379.

It can be divided in two parts, 91948920 and 1, that added together give a square (91948921 = 9589²).

The spelling of 919489201 in words is "nine hundred nineteen million, four hundred eighty-nine thousand, two hundred one".