978151 has 2 divisors, whose sum is σ = 978152. Its totient is φ = 978150.

The previous prime is 978149. The next prime is 978157. The reversal of 978151 is 151879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978151 - 2¹ = 978149 is a prime.

Together with 978149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489075 + 489076.

It is an arithmetic number, because the mean of its divisors is an integer number (489076).

2⁹⁷⁸¹⁵¹ is an apocalyptic number.

978151 is a deficient number, since it is larger than the sum of its proper divisors (1).

978151 is an equidigital number, since it uses as much as digits as its factorization.

978151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 31.

The square root of 978151 is about 989.0151667189. The cubic root of 978151 is about 99.2663304537.

The spelling of 978151 in words is "nine hundred seventy-eight thousand, one hundred fifty-one".