1952377921 has 8 divisors (see below), whose sum is σ = 2102987880. Its totient is φ = 1801828992.

The previous prime is 1952377913. The next prime is 1952377939. The reversal of 1952377921 is 1297732591.

It can be written as a sum of positive squares in 4 ways, for example, as 505521 + 1951872400 = 711^2 + 44180^2 .

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 1952377921 - 2³ = 1952377913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1952377981) 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, 68085 + ... + 92413.

It is an arithmetic number, because the mean of its divisors is an integer number (262873485).

Almost surely, 2^1952377921 is an apocalyptic number.

It is an amenable number.

1952377921 is a deficient number, since it is larger than the sum of its proper divisors (150609959).

1952377921 is a wasteful number, since it uses less digits than its factorization.

1952377921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30515.

The product of its digits is 238140, while the sum is 46.

The square root of 1952377921 is about 44185.7207817186. The cubic root of 1952377921 is about 1249.8406028216.

The spelling of 1952377921 in words is "one billion, nine hundred fifty-two million, three hundred seventy-seven thousand, nine hundred twenty-one".