1491650497 has 8 divisors (see below), whose sum is σ = 1528295040. Its totient is φ = 1455320880.

The previous prime is 1491650491. The next prime is 1491650509. The reversal of 1491650497 is 7940561941.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1491650497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491650491) 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, 69129 + ... + 88102.

It is an arithmetic number, because the mean of its divisors is an integer number (191036880).

Almost surely, 2^1491650497 is an apocalyptic number.

It is an amenable number.

1491650497 is a deficient number, since it is larger than the sum of its proper divisors (36644543).

1491650497 is a wasteful number, since it uses less digits than its factorization.

1491650497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157463.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1491650497 is about 38621.8914218348. The cubic root of 1491650497 is about 1142.5863349953.

The spelling of 1491650497 in words is "one billion, four hundred ninety-one million, six hundred fifty thousand, four hundred ninety-seven".