90920213 has 4 divisors (see below), whose sum is σ = 91168320. Its totient is φ = 90672108.

The previous prime is 90920209. The next prime is 90920227. The reversal of 90920213 is 31202909.

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 90920213 - 2² = 90920209 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 (90920293) 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, 123503 + ... + 124236.

It is an arithmetic number, because the mean of its divisors is an integer number (22792080).

Almost surely, 2^90920213 is an apocalyptic number.

It is an amenable number.

90920213 is a deficient number, since it is larger than the sum of its proper divisors (248107).

90920213 is a wasteful number, since it uses less digits than its factorization.

90920213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248106.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 90920213 is about 9535.2091219857. The cubic root of 90920213 is about 449.6626492196.

The spelling of 90920213 in words is "ninety million, nine hundred twenty thousand, two hundred thirteen".