97770391 has 8 divisors (see below), whose sum is σ = 100581440. Its totient is φ = 94968288.

The previous prime is 97770389. The next prime is 97770403. The reversal of 97770391 is 19307779.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 97770391 - 2¹ = 97770389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97770341) 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, 24370 + ... + 28096.

It is an arithmetic number, because the mean of its divisors is an integer number (12572680).

Almost surely, 2^97770391 is an apocalyptic number.

97770391 is a deficient number, since it is larger than the sum of its proper divisors (2811049).

97770391 is a wasteful number, since it uses less digits than its factorization.

97770391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473.

The product of its (nonzero) digits is 83349, while the sum is 43.

The square root of 97770391 is about 9887.8911300641. The cubic root of 97770391 is about 460.6832803993.

The spelling of 97770391 in words is "ninety-seven million, seven hundred seventy thousand, three hundred ninety-one".