377647421 has 4 divisors (see below), whose sum is σ = 378991644. Its totient is φ = 376303200.

The previous prime is 377647379. The next prime is 377647423. The reversal of 377647421 is 124746773.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 304886521 + 72760900 = 17461^2 + 8530^2 .

It is a cyclic number.

It is not a de Polignac number, because 377647421 - 2¹⁰ = 377646397 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 (377647423) 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, 671690 + ... + 672251.

It is an arithmetic number, because the mean of its divisors is an integer number (94747911).

Almost surely, 2^377647421 is an apocalyptic number.

It is an amenable number.

377647421 is a deficient number, since it is larger than the sum of its proper divisors (1344223).

377647421 is a wasteful number, since it uses less digits than its factorization.

377647421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344222.

The product of its digits is 197568, while the sum is 41.

The square root of 377647421 is about 19433.1526263754. The cubic root of 377647421 is about 722.8178036197.

The spelling of 377647421 in words is "three hundred seventy-seven million, six hundred forty-seven thousand, four hundred twenty-one".