1217193970 has 16 divisors (see below), whose sum is σ = 2220963480. Its totient is φ = 480207744.

The previous prime is 1217193947. The next prime is 1217193997. The reversal of 1217193970 is 793917121.

It can be written as a sum of positive squares in 4 ways, for example, as 634888809 + 582305161 = 25197^2 + 24131^2 .

It is a super-2 number, since 2×1217193970² = 2963122321208721800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 832965 + ... + 834424.

Almost surely, 2^1217193970 is an apocalyptic number.

1217193970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1217193970 is a deficient number, since it is larger than the sum of its proper divisors (1003769510).

1217193970 is a wasteful number, since it uses less digits than its factorization.

1217193970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667469.

The product of its (nonzero) digits is 23814, while the sum is 40.

The square root of 1217193970 is about 34888.3070669816. The cubic root of 1217193970 is about 1067.7098863888.

The spelling of 1217193970 in words is "one billion, two hundred seventeen million, one hundred ninety-three thousand, nine hundred seventy".