97780534 has 4 divisors (see below), whose sum is σ = 146670804. Its totient is φ = 48890266.

The previous prime is 97780519. The next prime is 97780597. The reversal of 97780534 is 43508779.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×97780534² = 19122065658650312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24445132 + ... + 24445135.

It is an arithmetic number, because the mean of its divisors is an integer number (36667701).

Almost surely, 2^97780534 is an apocalyptic number.

97780534 is a deficient number, since it is larger than the sum of its proper divisors (48890270).

97780534 is a wasteful number, since it uses less digits than its factorization.

97780534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48890269.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 97780534 is about 9888.4040168270. The cubic root of 97780534 is about 460.6992107469.

The spelling of 97780534 in words is "ninety-seven million, seven hundred eighty thousand, five hundred thirty-four".