1697397890 has 16 divisors (see below), whose sum is σ = 3062283840. Its totient is φ = 677410800.

The previous prime is 1697397883. The next prime is 1697397913. The reversal of 1697397890 is 987937961.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188936 + ... + 197715.

It is an arithmetic number, because the mean of its divisors is an integer number (191392740).

Almost surely, 2^1697397890 is an apocalyptic number.

1697397890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1697397890 is a deficient number, since it is larger than the sum of its proper divisors (1364885950).

1697397890 is a wasteful number, since it uses less digits than its factorization.

1697397890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387097.

The product of its (nonzero) digits is 5143824, while the sum is 59.

The square root of 1697397890 is about 41199.4889531412. The cubic root of 1697397890 is about 1192.8739447869.

The spelling of 1697397890 in words is "one billion, six hundred ninety-seven million, three hundred ninety-seven thousand, eight hundred ninety".