13197961 has 4 divisors (see below), whose sum is σ = 15083392. Its totient is φ = 11312532.

The previous prime is 13197959. The next prime is 13197979. The reversal of 13197961 is 16979131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16979131 = 13 ⋅1306087.

It is not a de Polignac number, because 13197961 - 2¹ = 13197959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13197961.

It is not an unprimeable number, because it can be changed into a prime (13197991) 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, 942705 + ... + 942718.

It is an arithmetic number, because the mean of its divisors is an integer number (3770848).

Almost surely, 2^13197961 is an apocalyptic number.

It is an amenable number.

13197961 is a deficient number, since it is larger than the sum of its proper divisors (1885431).

13197961 is an equidigital number, since it uses as much as digits as its factorization.

13197961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885430.

The product of its digits is 10206, while the sum is 37.

The square root of 13197961 is about 3632.8998059402. The cubic root of 13197961 is about 236.3209806969.

The spelling of 13197961 in words is "thirteen million, one hundred ninety-seven thousand, nine hundred sixty-one".