3969401623 has 8 divisors (see below), whose sum is σ = 4330734336. Its totient is φ = 3608148600.

The previous prime is 3969401609. The next prime is 3969401627. The reversal of 3969401623 is 3261049693.

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 3969401623 - 2²⁹ = 3432530711 is a prime.

It is a super-2 number, since 2×3969401623² = 31512298489350068258, which contains 22 as substring.

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 3969401623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969401627) 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, 140290 + ... + 166192.

It is an arithmetic number, because the mean of its divisors is an integer number (541341792).

Almost surely, 2^3969401623 is an apocalyptic number.

3969401623 is a deficient number, since it is larger than the sum of its proper divisors (361332713).

3969401623 is a wasteful number, since it uses less digits than its factorization.

3969401623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39845.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 3969401623 is about 63003.1874034957. The cubic root of 3969401623 is about 1583.3430289145.

The spelling of 3969401623 in words is "three billion, nine hundred sixty-nine million, four hundred one thousand, six hundred twenty-three".