1697949121 has 8 divisors (see below), whose sum is σ = 1877683104. Its totient is φ = 1522444320.

The previous prime is 1697949073. The next prime is 1697949131. The reversal of 1697949121 is 1219497961.

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 1697949121 - 2²⁵ = 1664394689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1697949131) 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, 1056451 + ... + 1058056.

It is an arithmetic number, because the mean of its divisors is an integer number (234710388).

Almost surely, 2^1697949121 is an apocalyptic number.

1697949121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1697949121 is a deficient number, since it is larger than the sum of its proper divisors (179733983).

1697949121 is a wasteful number, since it uses less digits than its factorization.

1697949121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114591.

The product of its digits is 244944, while the sum is 49.

The square root of 1697949121 is about 41206.1781896841. The cubic root of 1697949121 is about 1193.0030596582.

The spelling of 1697949121 in words is "one billion, six hundred ninety-seven million, nine hundred forty-nine thousand, one hundred twenty-one".