712621978 has 8 divisors (see below), whose sum is σ = 1074839220. Its totient is φ = 354342240.

The previous prime is 712621967. The next prime is 712621993. The reversal of 712621978 is 879126217.

It can be written as a sum of positive squares in 2 ways, for example, as 706336929 + 6285049 = 26577^2 + 2507^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 983923 + ... + 984646.

Almost surely, 2^712621978 is an apocalyptic number.

712621978 is a deficient number, since it is larger than the sum of its proper divisors (362217242).

712621978 is a wasteful number, since it uses less digits than its factorization.

712621978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968752.

The product of its digits is 84672, while the sum is 43.

The square root of 712621978 is about 26694.9803895789. The cubic root of 712621978 is about 893.2089596596.

The spelling of 712621978 in words is "seven hundred twelve million, six hundred twenty-one thousand, nine hundred seventy-eight".