11761997 has 4 divisors (see below), whose sum is σ = 12666780. Its totient is φ = 10857216.

The previous prime is 11761991. The next prime is 11762027. The reversal of 11761997 is 79916711.

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 3200521 + 8561476 = 1789^2 + 2926^2 .

It is a cyclic number.

It is not a de Polignac number, because 11761997 - 2¹² = 11757901 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 (11761991) 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, 452372 + ... + 452397.

It is an arithmetic number, because the mean of its divisors is an integer number (3166695).

Almost surely, 2^11761997 is an apocalyptic number.

It is an amenable number.

11761997 is a deficient number, since it is larger than the sum of its proper divisors (904783).

11761997 is an equidigital number, since it uses as much as digits as its factorization.

11761997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904782.

The product of its digits is 23814, while the sum is 41.

The square root of 11761997 is about 3429.5767960493. The cubic root of 11761997 is about 227.4191444744.

The spelling of 11761997 in words is "eleven million, seven hundred sixty-one thousand, nine hundred ninety-seven".