11901897 has 24 divisors (see below), whose sum is σ = 20378176. Its totient is φ = 6800112.

The previous prime is 11901821. The next prime is 11901899. The reversal of 11901897 is 79810911.

It is not a de Polignac number, because 11901897 - 2¹⁴ = 11885513 is a prime.

11901897 is a modest number, since divided by 1897 gives 119 as remainder.

It is not an unprimeable number, because it can be changed into a prime (11901899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1798 + ... + 5199.

Almost surely, 2^11901897 is an apocalyptic number.

It is an amenable number.

11901897 is a deficient number, since it is larger than the sum of its proper divisors (8476279).

11901897 is an frugal number, since it uses more digits than its factorization.

11901897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7019 (or 7007 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 11901897 is about 3449.9126075888. The cubic root of 11901897 is about 228.3172522581.

The spelling of 11901897 in words is "eleven million, nine hundred one thousand, eight hundred ninety-seven".