919049491 has 2 divisors, whose sum is σ = 919049492. Its totient is φ = 919049490.

The previous prime is 919049477. The next prime is 919049501. The reversal of 919049491 is 194940919.

It is a strong prime.

It is an emirp because it is prime and its reverse (194940919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 919049491 - 2⁵ = 919049459 is a prime.

It is a super-3 number, since 3×919049491³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (919049471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459524745 + 459524746.

It is an arithmetic number, because the mean of its divisors is an integer number (459524746).

Almost surely, 2^919049491 is an apocalyptic number.

919049491 is a deficient number, since it is larger than the sum of its proper divisors (1).

919049491 is an equidigital number, since it uses as much as digits as its factorization.

919049491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 919049491 is about 30315.8290501843. The cubic root of 919049491 is about 972.2537635428.

The spelling of 919049491 in words is "nine hundred nineteen million, forty-nine thousand, four hundred ninety-one".