90977261 has 4 divisors (see below), whose sum is σ = 91556892. Its totient is φ = 90397632.

The previous prime is 90977221. The next prime is 90977303. The reversal of 90977261 is 16277909.

It is a happy number.

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 35772361 + 55204900 = 5981^2 + 7430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90977261 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 (90977221) 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, 289580 + ... + 289893.

It is an arithmetic number, because the mean of its divisors is an integer number (22889223).

Almost surely, 2^90977261 is an apocalyptic number.

It is an amenable number.

90977261 is a deficient number, since it is larger than the sum of its proper divisors (579631).

90977261 is a wasteful number, since it uses less digits than its factorization.

90977261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579630.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 90977261 is about 9538.2000922606. The cubic root of 90977261 is about 449.7566766848.

The spelling of 90977261 in words is "ninety million, nine hundred seventy-seven thousand, two hundred sixty-one".