1017897970 has 32 divisors (see below), whose sum is σ = 1908198000. Its totient is φ = 390464256.

The previous prime is 1017897949. The next prime is 1017898003. The reversal of 1017897970 is 797987101.

It can be written as a sum of positive squares in 8 ways, for example, as 19527561 + 998370409 = 4419^2 + 31597^2 .

It is a super-2 number, since 2×1017897970² = 2072232554660241800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31432 + ... + 54988.

Almost surely, 2^1017897970 is an apocalyptic number.

1017897970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1017897970 is a deficient number, since it is larger than the sum of its proper divisors (890300030).

1017897970 is a wasteful number, since it uses less digits than its factorization.

1017897970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23742.

The product of its (nonzero) digits is 222264, while the sum is 49.

The square root of 1017897970 is about 31904.5133170842. The cubic root of 1017897970 is about 1005.9307467079.

The spelling of 1017897970 in words is "one billion, seventeen million, eight hundred ninety-seven thousand, nine hundred seventy".