1491963519 has 8 divisors (see below), whose sum is σ = 1990159920. Its totient is φ = 994204736.

The previous prime is 1491963509. The next prime is 1491963523. The reversal of 1491963519 is 9153691941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1491963519 - 2¹⁶ = 1491897983 is a prime.

It is a super-2 number, since 2×1491963519² = 4451910284053726722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491963509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101364 + ... + 115145.

It is an arithmetic number, because the mean of its divisors is an integer number (248769990).

Almost surely, 2^1491963519 is an apocalyptic number.

1491963519 is a deficient number, since it is larger than the sum of its proper divisors (498196401).

1491963519 is a wasteful number, since it uses less digits than its factorization.

1491963519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218809.

The product of its digits is 262440, while the sum is 48.

The square root of 1491963519 is about 38625.9436001245. The cubic root of 1491963519 is about 1142.6662531006. Note that the first 3 decimals are identical.

The spelling of 1491963519 in words is "one billion, four hundred ninety-one million, nine hundred sixty-three thousand, five hundred nineteen".