381451634 has 4 divisors (see below), whose sum is σ = 572177454. Its totient is φ = 190725816.

The previous prime is 381451613. The next prime is 381451663. The reversal of 381451634 is 436154183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 436154183 = 467 ⋅933949.

It can be written as a sum of positive squares in only one way, i.e., 246961225 + 134490409 = 15715^2 + 11597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 381451594 and 381451603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95362907 + ... + 95362910.

Almost surely, 2^381451634 is an apocalyptic number.

381451634 is a deficient number, since it is larger than the sum of its proper divisors (190725820).

381451634 is a wasteful number, since it uses less digits than its factorization.

381451634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190725819.

The product of its digits is 34560, while the sum is 35.

The square root of 381451634 is about 19530.7868249080. The cubic root of 381451634 is about 725.2367892422.

The spelling of 381451634 in words is "three hundred eighty-one million, four hundred fifty-one thousand, six hundred thirty-four".