3973099691 has 8 divisors (see below), whose sum is σ = 4340212464. Its totient is φ = 3606973920.

The previous prime is 3973099667. The next prime is 3973099723. The reversal of 3973099691 is 1969903793.

3973099691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3973099691 - 2²² = 3968905387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3973099621) 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, 238316 + ... + 254441.

It is an arithmetic number, because the mean of its divisors is an integer number (542526558).

Almost surely, 2^3973099691 is an apocalyptic number.

3973099691 is a deficient number, since it is larger than the sum of its proper divisors (367112773).

3973099691 is a wasteful number, since it uses less digits than its factorization.

3973099691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493501.

The product of its (nonzero) digits is 2480058, while the sum is 56.

The square root of 3973099691 is about 63032.5288323418. The cubic root of 3973099691 is about 1583.8345801465.

The spelling of 3973099691 in words is "three billion, nine hundred seventy-three million, ninety-nine thousand, six hundred ninety-one".