97211405 has 8 divisors (see below), whose sum is σ = 116949912. Its totient is φ = 77571648.

The previous prime is 97211383. The next prime is 97211431. The reversal of 97211405 is 50411279.

It can be written as a sum of positive squares in 4 ways, for example, as 1582564 + 95628841 = 1258^2 + 9779^2 .

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 97211405 - 2¹⁶ = 97145869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22502 + ... + 26471.

It is an arithmetic number, because the mean of its divisors is an integer number (14618739).

Almost surely, 2^97211405 is an apocalyptic number.

It is an amenable number.

97211405 is a deficient number, since it is larger than the sum of its proper divisors (19738507).

97211405 is a wasteful number, since it uses less digits than its factorization.

97211405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49375.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 97211405 is about 9859.5844232909. The cubic root of 97211405 is about 459.8036417762.

The spelling of 97211405 in words is "ninety-seven million, two hundred eleven thousand, four hundred five".