9943249690 has 64 divisors (see below), whose sum is σ = 20190643200. Its totient is φ = 3492864000.

The previous prime is 9943249681. The next prime is 9943249711. The reversal of 9943249690 is 969423499.

9943249690 is a nontrivial binomial coefficient, being equal to C(141020, 2).

It is a super-2 number, since 2×9943249690² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2183536 + ... + 2188084.

It is an arithmetic number, because the mean of its divisors is an integer number (315478800).

Almost surely, 2^9943249690 is an apocalyptic number.

9943249690 is the 141019-th triangular number and also the 70510-th hexagonal number.

9943249690 is the 47007-th centered nonagonal number.

9943249690 is an abundant number, since it is smaller than the sum of its proper divisors (10247393510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9943249690 is a wasteful number, since it uses less digits than its factorization.

9943249690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5239.

The product of its (nonzero) digits is 3779136, while the sum is 55.

The square root of 9943249690 is about 99715.8447289096. The cubic root of 9943249690 is about 2150.3514615626.

The spelling of 9943249690 in words is "nine billion, nine hundred forty-three million, two hundred forty-nine thousand, six hundred ninety".