97278769 has 9 divisors (see below), whose sum is σ = 113241387. Its totient is φ = 83322624.

The previous prime is 97278763. The next prime is 97278781. The reversal of 97278769 is 96787279.

The square root of 97278769 is 9863.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1238769 + 96040000 = 1113^2 + 9800^2 .

It is not a de Polignac number, because 97278769 - 2⁹ = 97278257 is a prime.

It is a super-2 number, since 2×97278769² = 18926317796310722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (97278763) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 68337 + ... + 69745.

Almost surely, 2^97278769 is an apocalyptic number.

97278769 is the 9863-rd square number.

97278769 is the 4932-nd centered octagonal number.

It is an amenable number.

97278769 is a deficient number, since it is larger than the sum of its proper divisors (15962618).

97278769 is an frugal number, since it uses more digits than its factorization.

97278769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832 (or 1416 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 55.

The cubic root of 97278769 is about 459.9098263698.

It can be divided in two parts, 9727 and 8769, that added together give a square (18496 = 136²).

The spelling of 97278769 in words is "ninety-seven million, two hundred seventy-eight thousand, seven hundred sixty-nine".