8978497007 has 4 divisors (see below), whose sum is σ = 8983884696. Its totient is φ = 8973109320.

The previous prime is 8978496991. The next prime is 8978497037. The reversal of 8978497007 is 7007948798.

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 8978497007 - 2⁴ = 8978496991 is a prime.

It is a super-2 number, since 2×8978497007² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8978497037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2691344 + ... + 2694677.

It is an arithmetic number, because the mean of its divisors is an integer number (2245971174).

Almost surely, 2^8978497007 is an apocalyptic number.

8978497007 is a deficient number, since it is larger than the sum of its proper divisors (5387689).

8978497007 is a wasteful number, since it uses less digits than its factorization.

8978497007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5387688.

The product of its (nonzero) digits is 7112448, while the sum is 59.

The square root of 8978497007 is about 94754.9313070301. The cubic root of 8978497007 is about 2078.4259083495.

The spelling of 8978497007 in words is "eight billion, nine hundred seventy-eight million, four hundred ninety-seven thousand, seven".