978735149 has 32 divisors (see below), whose sum is σ = 1171183104. Its totient is φ = 800593920.

The previous prime is 978735143. The next prime is 978735157. The reversal of 978735149 is 941537879.

It is not a de Polignac number, because 978735149 - 2¹² = 978731053 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 978735149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978735143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3340247 + ... + 3340539.

It is an arithmetic number, because the mean of its divisors is an integer number (36599472).

Almost surely, 2^978735149 is an apocalyptic number.

It is an amenable number.

978735149 is a deficient number, since it is larger than the sum of its proper divisors (192447955).

978735149 is a wasteful number, since it uses less digits than its factorization.

978735149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557.

The product of its digits is 1905120, while the sum is 53.

The square root of 978735149 is about 31284.7430707046. The cubic root of 978735149 is about 992.8608704497.

The spelling of 978735149 in words is "nine hundred seventy-eight million, seven hundred thirty-five thousand, one hundred forty-nine".