90529597397 has 4 divisors (see below), whose sum is σ = 91190397516. Its totient is φ = 89868797280.

The previous prime is 90529597351. The next prime is 90529597427. The reversal of 90529597397 is 79379592509.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56991535441 + 33538061956 = 238729^2 + 183134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90529597397 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 (90529590397) 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, 330399854 + ... + 330400127.

It is an arithmetic number, because the mean of its divisors is an integer number (22797599379).

Almost surely, 2^90529597397 is an apocalyptic number.

It is an amenable number.

90529597397 is a deficient number, since it is larger than the sum of its proper divisors (660800119).

90529597397 is a wasteful number, since it uses less digits than its factorization.

90529597397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660800118.

The product of its (nonzero) digits is 48223350, while the sum is 65.

The spelling of 90529597397 in words is "ninety billion, five hundred twenty-nine million, five hundred ninety-seven thousand, three hundred ninety-seven".