97145780 has 12 divisors (see below), whose sum is σ = 204006180. Its totient is φ = 38858304.

The previous prime is 97145771. The next prime is 97145809. The reversal of 97145780 is 8754179.

It can be written as a sum of positive squares in 2 ways, for example, as 47499664 + 49646116 = 6892^2 + 7046^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2428625 + ... + 2428664.

It is an arithmetic number, because the mean of its divisors is an integer number (17000515).

Almost surely, 2^97145780 is an apocalyptic number.

It is an amenable number.

97145780 is an abundant number, since it is smaller than the sum of its proper divisors (106860400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97145780 is a wasteful number, since it uses less digits than its factorization.

97145780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4857298 (or 4857296 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 97145780 is about 9856.2558814187. The cubic root of 97145780 is about 459.7001511532.

The spelling of 97145780 in words is "ninety-seven million, one hundred forty-five thousand, seven hundred eighty".