97780551 has 8 divisors (see below), whose sum is σ = 142226304. Its totient is φ = 59260920.

The previous prime is 97780519. The next prime is 97780597. The reversal of 97780551 is 15508779.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 97780551 - 2⁵ = 97780519 is a prime.

It is a super-2 number, since 2×97780551² = 19122072307727202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97785551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1481491 + ... + 1481556.

It is an arithmetic number, because the mean of its divisors is an integer number (17778288).

Almost surely, 2^97780551 is an apocalyptic number.

97780551 is a deficient number, since it is larger than the sum of its proper divisors (44445753).

97780551 is a wasteful number, since it uses less digits than its factorization.

97780551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963061.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 97780551 is about 9888.4048764197. The cubic root of 97780551 is about 460.6992374458.

The spelling of 97780551 in words is "ninety-seven million, seven hundred eighty thousand, five hundred fifty-one".