7949121364 has 6 divisors (see below), whose sum is σ = 13910962394. Its totient is φ = 3974560680.

The previous prime is 7949121361. The next prime is 7949121377. The reversal of 7949121364 is 4631219497.

It can be written as a sum of positive squares in only one way, i.e., 7904632464 + 44488900 = 88908^2 + 6670^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7949121361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993640167 + ... + 993640174.

Almost surely, 2^7949121364 is an apocalyptic number.

It is an amenable number.

7949121364 is a deficient number, since it is larger than the sum of its proper divisors (5961841030).

7949121364 is a wasteful number, since it uses less digits than its factorization.

7949121364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987280345 (or 1987280343 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 7949121364 is about 89157.8452184663. The cubic root of 7949121364 is about 1995.7510934555.

The spelling of 7949121364 in words is "seven billion, nine hundred forty-nine million, one hundred twenty-one thousand, three hundred sixty-four".