3952472921 has 2 divisors, whose sum is σ = 3952472922. Its totient is φ = 3952472920.

The previous prime is 3952472861. The next prime is 3952472957. The reversal of 3952472921 is 1292742593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2931031321 + 1021441600 = 54139^2 + 31960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3952472921 is a prime.

It is not a weakly prime, because it can be changed into another prime (3952472971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1976236460 + 1976236461.

It is an arithmetic number, because the mean of its divisors is an integer number (1976236461).

Almost surely, 2^3952472921 is an apocalyptic number.

It is an amenable number.

3952472921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3952472921 is an equidigital number, since it uses as much as digits as its factorization.

3952472921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 3952472921 is about 62868.6958748152. The cubic root of 3952472921 is about 1581.0889412820.

The spelling of 3952472921 in words is "three billion, nine hundred fifty-two million, four hundred seventy-two thousand, nine hundred twenty-one".