978867077 has 2 divisors, whose sum is σ = 978867078. Its totient is φ = 978867076.

The previous prime is 978867031. The next prime is 978867091. The reversal of 978867077 is 770768879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 830246596 + 148620481 = 28814^2 + 12191^2 .

It is a cyclic number.

It is not a de Polignac number, because 978867077 - 2²⁴ = 962089861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978867977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489433538 + 489433539.

It is an arithmetic number, because the mean of its divisors is an integer number (489433539).

Almost surely, 2^978867077 is an apocalyptic number.

It is an amenable number.

978867077 is a deficient number, since it is larger than the sum of its proper divisors (1).

978867077 is an equidigital number, since it uses as much as digits as its factorization.

978867077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8297856, while the sum is 59.

The square root of 978867077 is about 31286.8515034671. The cubic root of 978867077 is about 992.9054791347.

The spelling of 978867077 in words is "nine hundred seventy-eight million, eight hundred sixty-seven thousand, seventy-seven".