491619 has 16 divisors (see below), whose sum is σ = 695552. Its totient is φ = 308448.

The previous prime is 491611. The next prime is 491627. The reversal of 491619 is 916194.

It is an interprime number because it is at equal distance from previous prime (491611) and next prime (491627).

It is not a de Polignac number, because 491619 - 2³ = 491611 is a prime.

It is a super-2 number, since 2×491619² = 483378482322, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (491611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4722 + ... + 4824.

It is an arithmetic number, because the mean of its divisors is an integer number (43472).

2⁴⁹¹⁶¹⁹ is an apocalyptic number.

491619 is a deficient number, since it is larger than the sum of its proper divisors (203933).

491619 is a wasteful number, since it uses less digits than its factorization.

491619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186.

The product of its digits is 1944, while the sum is 30.

The square root of 491619 is about 701.1554749127. The cubic root of 491619 is about 78.9240845254.

The spelling of 491619 in words is "four hundred ninety-one thousand, six hundred nineteen".