905381506 has 4 divisors (see below), whose sum is σ = 1358072262. Its totient is φ = 452690752.

The previous prime is 905381497. The next prime is 905381509. The reversal of 905381506 is 605183509.

905381506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605183509 = 7 ⋅86454787.

It can be written as a sum of positive squares in only one way, i.e., 698280625 + 207100881 = 26425^2 + 14391^2 .

It is not an unprimeable number, because it can be changed into a prime (905381509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226345375 + ... + 226345378.

Almost surely, 2^905381506 is an apocalyptic number.

905381506 is a deficient number, since it is larger than the sum of its proper divisors (452690756).

905381506 is a wasteful number, since it uses less digits than its factorization.

905381506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452690755.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 905381506 is about 30089.5580891445. The cubic root of 905381506 is about 967.4099272711.

The spelling of 905381506 in words is "nine hundred five million, three hundred eighty-one thousand, five hundred six".