1230978537 has 24 divisors (see below), whose sum is σ = 1811160000. Its totient is φ = 805430688.

The previous prime is 1230978533. The next prime is 1230978557. The reversal of 1230978537 is 7358790321.

It is a happy number.

1230978537 is a `hidden beast` number, since 1 + 23 + 0 + 97 + 8 + 537 = 666.

It is not a de Polignac number, because 1230978537 - 2² = 1230978533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1230978492 and 1230978501.

It is not an unprimeable number, because it can be changed into a prime (1230978533) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 408964 + ... + 411962.

It is an arithmetic number, because the mean of its divisors is an integer number (75465000).

Almost surely, 2^1230978537 is an apocalyptic number.

It is an amenable number.

1230978537 is a deficient number, since it is larger than the sum of its proper divisors (580181463).

1230978537 is a wasteful number, since it uses less digits than its factorization.

1230978537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837 (or 3834 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 1230978537 is about 35085.3037182237. The cubic root of 1230978537 is about 1071.7253257925.

The spelling of 1230978537 in words is "one billion, two hundred thirty million, nine hundred seventy-eight thousand, five hundred thirty-seven".