1213098836 has 24 divisors (see below), whose sum is σ = 2159294760. Its totient is φ = 596237312.

The previous prime is 1213098827. The next prime is 1213098841. The reversal of 1213098836 is 6388903121.

It can be written as a sum of positive squares in 4 ways, for example, as 81180100 + 1131918736 = 9010^2 + 33644^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1213098793 and 1213098802.

It is a congruent number.

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, 51740 + ... + 71436.

It is an arithmetic number, because the mean of its divisors is an integer number (89970615).

Almost surely, 2^1213098836 is an apocalyptic number.

It is an amenable number.

1213098836 is a deficient number, since it is larger than the sum of its proper divisors (946195924).

1213098836 is a wasteful number, since it uses less digits than its factorization.

1213098836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19963 (or 19961 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1213098836 is about 34829.5684153565. The cubic root of 1213098836 is about 1066.5111380443.

The spelling of 1213098836 in words is "one billion, two hundred thirteen million, ninety-eight thousand, eight hundred thirty-six".