3921513901 has 4 divisors (see below), whose sum is σ = 3935984704. Its totient is φ = 3907043100.

The previous prime is 3921513881. The next prime is 3921513907. The reversal of 3921513901 is 1093151293.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3921513901 - 2⁹ = 3921513389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921513907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7234995 + ... + 7235536.

It is an arithmetic number, because the mean of its divisors is an integer number (983996176).

Almost surely, 2^3921513901 is an apocalyptic number.

It is an amenable number.

3921513901 is a deficient number, since it is larger than the sum of its proper divisors (14470803).

3921513901 is a wasteful number, since it uses less digits than its factorization.

3921513901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14470802.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 3921513901 is about 62621.9921513201. The cubic root of 3921513901 is about 1576.9499859956.

The spelling of 3921513901 in words is "three billion, nine hundred twenty-one million, five hundred thirteen thousand, nine hundred one".