906447949 has 4 divisors (see below), whose sum is σ = 988852320. Its totient is φ = 824043580.

The previous prime is 906447937. The next prime is 906447961. The reversal of 906447949 is 949744609.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (906447937) and next prime (906447961).

It is a cyclic number.

It is not a de Polignac number, because 906447949 - 2¹⁹ = 905923661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 906447896 and 906447905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906447929) 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, 41202169 + ... + 41202190.

It is an arithmetic number, because the mean of its divisors is an integer number (247213080).

Almost surely, 2^906447949 is an apocalyptic number.

It is an amenable number.

906447949 is a deficient number, since it is larger than the sum of its proper divisors (82404371).

906447949 is a wasteful number, since it uses less digits than its factorization.

906447949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82404370.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 906447949 is about 30107.2740214055. The cubic root of 906447949 is about 967.7896135251.

The spelling of 906447949 in words is "nine hundred six million, four hundred forty-seven thousand, nine hundred forty-nine".