1213740369 has 20 divisors (see below), whose sum is σ = 1820372400. Its totient is φ = 805923000.

The previous prime is 1213740323. The next prime is 1213740377. The reversal of 1213740369 is 9630473121.

It is not a de Polignac number, because 1213740369 - 2⁸ = 1213740113 is a prime.

It is a super-2 number, since 2×1213740369² = 2946331366680512322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1213740169) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9519 + ... + 50180.

It is an arithmetic number, because the mean of its divisors is an integer number (91018620).

Almost surely, 2^1213740369 is an apocalyptic number.

It is an amenable number.

1213740369 is a deficient number, since it is larger than the sum of its proper divisors (606632031).

1213740369 is an equidigital number, since it uses as much as digits as its factorization.

1213740369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59962 (or 59953 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 1213740369 is about 34838.7768011450. The cubic root of 1213740369 is about 1066.6991088549.

The spelling of 1213740369 in words is "one billion, two hundred thirteen million, seven hundred forty thousand, three hundred sixty-nine".