121964749 has 8 divisors (see below), whose sum is σ = 133592760. Its totient is φ = 110831616.

The previous prime is 121964737. The next prime is 121964761. The reversal of 121964749 is 947469121.

It is an interprime number because it is at equal distance from previous prime (121964737) and next prime (121964761).

It can be written as a sum of positive squares in 4 ways, for example, as 62520649 + 59444100 = 7907^2 + 7710^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121964749 - 2²⁵ = 88410317 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 (121964779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123204 + ... + 124189.

It is an arithmetic number, because the mean of its divisors is an integer number (16699095).

Almost surely, 2^121964749 is an apocalyptic number.

It is an amenable number.

121964749 is a deficient number, since it is larger than the sum of its proper divisors (11628011).

121964749 is a wasteful number, since it uses less digits than its factorization.

121964749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247439.

The product of its digits is 108864, while the sum is 43.

The square root of 121964749 is about 11043.7651641096. The cubic root of 121964749 is about 495.9197930595.

The spelling of 121964749 in words is "one hundred twenty-one million, nine hundred sixty-four thousand, seven hundred forty-nine".