1217387934 has 32 divisors (see below), whose sum is σ = 3091779840. Its totient is φ = 347825016.

The previous prime is 1217387933. The next prime is 1217387957. The reversal of 1217387934 is 4397837121.

It is a self number, because there is not a number n which added to its sum of digits gives 1217387934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217387933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1609924 + ... + 1610679.

It is an arithmetic number, because the mean of its divisors is an integer number (96618120).

Almost surely, 2^1217387934 is an apocalyptic number.

1217387934 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1217387934 is an abundant number, since it is smaller than the sum of its proper divisors (1874391906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1217387934 is a wasteful number, since it uses less digits than its factorization.

1217387934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220621 (or 3220615 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 1217387934 is about 34891.0867414588. The cubic root of 1217387934 is about 1067.7665977774.

The spelling of 1217387934 in words is "one billion, two hundred seventeen million, three hundred eighty-seven thousand, nine hundred thirty-four".