3699923921 has 2 divisors, whose sum is σ = 3699923922. Its totient is φ = 3699923920.

The previous prime is 3699923881. The next prime is 3699923923. The reversal of 3699923921 is 1293299963.

3699923921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2648543296 + 1051380625 = 51464^2 + 32425^2 .

It is an emirp because it is prime and its reverse (1293299963) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3699923921 is a prime.

Together with 3699923923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3699923923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1849961960 + 1849961961.

It is an arithmetic number, because the mean of its divisors is an integer number (1849961961).

Almost surely, 2^3699923921 is an apocalyptic number.

It is an amenable number.

3699923921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3699923921 is an equidigital number, since it uses as much as digits as its factorization.

3699923921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417176, while the sum is 53.

The square root of 3699923921 is about 60826.9999342397. Note that the first 4 decimals coincide. The cubic root of 3699923921 is about 1546.6697728078.

The spelling of 3699923921 in words is "three billion, six hundred ninety-nine million, nine hundred twenty-three thousand, nine hundred twenty-one".