97770381 has 16 divisors (see below), whose sum is σ = 132123264. Its totient is φ = 64304064.

The previous prime is 97770367. The next prime is 97770389. The reversal of 97770381 is 18307779.

It is a happy number.

It is not a de Polignac number, because 97770381 - 2¹⁵ = 97737613 is a prime.

It is a super-2 number, since 2×97770381² = 19118094801770322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97770389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122275 + ... + 123071.

It is an arithmetic number, because the mean of its divisors is an integer number (8257704).

Almost surely, 2^97770381 is an apocalyptic number.

It is an amenable number.

97770381 is a deficient number, since it is larger than the sum of its proper divisors (34352883).

97770381 is a wasteful number, since it uses less digits than its factorization.

97770381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 97770381 is about 9887.8906243951. The cubic root of 97770381 is about 460.6832646930.

The spelling of 97770381 in words is "ninety-seven million, seven hundred seventy thousand, three hundred eighty-one".