978751201 has 2 divisors, whose sum is σ = 978751202. Its totient is φ = 978751200.

The previous prime is 978751181. The next prime is 978751229. The reversal of 978751201 is 102157879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 806616801 + 172134400 = 28401^2 + 13120^2 .

It is a cyclic number.

It is not a de Polignac number, because 978751201 - 2¹³ = 978743009 is a prime.

It is equal to p_49821286 and since 978751201 and 49821286 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (978751261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489375600 + 489375601.

It is an arithmetic number, because the mean of its divisors is an integer number (489375601).

Almost surely, 2^978751201 is an apocalyptic number.

It is an amenable number.

978751201 is a deficient number, since it is larger than the sum of its proper divisors (1).

978751201 is an equidigital number, since it uses as much as digits as its factorization.

978751201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 978751201 is about 31284.9996164296. Note that the first 3 decimals coincide. The cubic root of 978751201 is about 992.8662983109.

The spelling of 978751201 in words is "nine hundred seventy-eight million, seven hundred fifty-one thousand, two hundred one".