1234978906351 has 4 divisors (see below), whose sum is σ = 1235545672600. Its totient is φ = 1234412140104.

The previous prime is 1234978906349. The next prime is 1234978906363. The reversal of 1234978906351 is 1536098794321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1234978906351 - 2¹ = 1234978906349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234978906151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283379856 + ... + 283384213.

It is an arithmetic number, because the mean of its divisors is an integer number (308886418150).

It is a 1-persistent number, because it is pandigital, but 2⋅1234978906351 = 2469957812702 is not.

Almost surely, 2^{1234978906351} is an apocalyptic number.

1234978906351 is a deficient number, since it is larger than the sum of its proper divisors (566766249).

1234978906351 is an equidigital number, since it uses as much as digits as its factorization.

1234978906351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566766248.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 1234978906351 in words is "one trillion, two hundred thirty-four billion, nine hundred seventy-eight million, nine hundred six thousand, three hundred fifty-one".