978091245 has 24 divisors (see below), whose sum is σ = 1696088472. Its totient is φ = 521424000.

The previous prime is 978091241. The next prime is 978091267. The reversal of 978091245 is 542190879.

It can be written as a sum of positive squares in 4 ways, for example, as 55086084 + 923005161 = 7422^2 + 30381^2 .

It is not a de Polignac number, because 978091245 - 2² = 978091241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 978091245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978091241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189195 + ... + 194295.

It is an arithmetic number, because the mean of its divisors is an integer number (70670353).

Almost surely, 2^978091245 is an apocalyptic number.

It is an amenable number.

978091245 is a deficient number, since it is larger than the sum of its proper divisors (717997227).

978091245 is a wasteful number, since it uses less digits than its factorization.

978091245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9373 (or 9370 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 978091245 is about 31274.4503548823. The cubic root of 978091245 is about 992.6430902747.

It can be divided in two parts, 9780 and 91245, that added together give a triangular number (101025 = T₄₄₉).

The spelling of 978091245 in words is "nine hundred seventy-eight million, ninety-one thousand, two hundred forty-five".