1491063697 has 8 divisors (see below), whose sum is σ = 1501632000. Its totient is φ = 1480509264.

The previous prime is 1491063689. The next prime is 1491063713. The reversal of 1491063697 is 7963601941.

It is a happy number.

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 1491063697 - 2³ = 1491063689 is a prime.

It is a super-2 number, since 2×1491063697² = 4446541897022615618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491063667) 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, 308304 + ... + 313102.

It is an arithmetic number, because the mean of its divisors is an integer number (187704000).

Almost surely, 2^1491063697 is an apocalyptic number.

It is an amenable number.

1491063697 is a deficient number, since it is larger than the sum of its proper divisors (10568303).

1491063697 is a wasteful number, since it uses less digits than its factorization.

1491063697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6935.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 1491063697 is about 38614.2939466721. The cubic root of 1491063697 is about 1142.4364880973.

The spelling of 1491063697 in words is "one billion, four hundred ninety-one million, sixty-three thousand, six hundred ninety-seven".