97394781 has 16 divisors (see below), whose sum is σ = 144069120. Its totient is φ = 58025520.

The previous prime is 97394771. The next prime is 97394783. The reversal of 97394781 is 18749379.

It is not a de Polignac number, because 97394781 - 2¹¹ = 97392733 is a prime.

It is a super-2 number, since 2×97394781² = 18971486732075922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 97394781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97394783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23065 + ... + 26958.

It is an arithmetic number, because the mean of its divisors is an integer number (9004320).

Almost surely, 2^97394781 is an apocalyptic number.

It is an amenable number.

97394781 is a deficient number, since it is larger than the sum of its proper divisors (46674339).

97394781 is a wasteful number, since it uses less digits than its factorization.

97394781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50096.

The product of its digits is 381024, while the sum is 48.

The square root of 97394781 is about 9868.8794196707. The cubic root of 97394781 is about 460.0925790350.

The spelling of 97394781 in words is "ninety-seven million, three hundred ninety-four thousand, seven hundred eighty-one".