1354991897 has 8 divisors (see below), whose sum is σ = 1630065600. Its totient is φ = 1100294064.

The previous prime is 1354991863. The next prime is 1354991917. The reversal of 1354991897 is 7981994531.

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-1354991897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1354991497) 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, 5093822 + ... + 5094087.

It is an arithmetic number, because the mean of its divisors is an integer number (203758200).

Almost surely, 2^1354991897 is an apocalyptic number.

It is an amenable number.

1354991897 is a deficient number, since it is larger than the sum of its proper divisors (275073703).

1354991897 is a wasteful number, since it uses less digits than its factorization.

1354991897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10187935.

The product of its digits is 2449440, while the sum is 56.

The square root of 1354991897 is about 36810.2145742184. The cubic root of 1354991897 is about 1106.5700188476.

The spelling of 1354991897 in words is "one billion, three hundred fifty-four million, nine hundred ninety-one thousand, eight hundred ninety-seven".