97129621 has 4 divisors (see below), whose sum is σ = 101352672. Its totient is φ = 92906572.

The previous prime is 97129609. The next prime is 97129649. The reversal of 97129621 is 12692179.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97129621 - 2¹¹ = 97127573 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 (97129601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2111491 + ... + 2111536.

It is an arithmetic number, because the mean of its divisors is an integer number (25338168).

Almost surely, 2^97129621 is an apocalyptic number.

It is an amenable number.

97129621 is a deficient number, since it is larger than the sum of its proper divisors (4223051).

97129621 is a wasteful number, since it uses less digits than its factorization.

97129621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223050.

The product of its digits is 13608, while the sum is 37.

The square root of 97129621 is about 9855.4361141453. The cubic root of 97129621 is about 459.6746612601.

The spelling of 97129621 in words is "ninety-seven million, one hundred twenty-nine thousand, six hundred twenty-one".