947909749 has 8 divisors (see below), whose sum is σ = 1006366680. Its totient is φ = 889752576.

The previous prime is 947909687. The next prime is 947909797.

947909749 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 117029124 + 830880625 = 10818^2 + 28825^2 .

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 947909749 - 2¹⁷ = 947778677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 947909693 and 947909702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947900749) 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, 68404 + ... + 81085.

It is an arithmetic number, because the mean of its divisors is an integer number (125795835).

Almost surely, 2^947909749 is an apocalyptic number.

It is an amenable number.

947909749 is a deficient number, since it is larger than the sum of its proper divisors (58456931).

947909749 is a wasteful number, since it uses less digits than its factorization.

947909749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149879.

The product of its (nonzero) digits is 5143824, while the sum is 58.

The square root of 947909749 is about 30788.1429936916. The cubic root of 947909749 is about 982.3260549258.

The spelling of 947909749 in words is "nine hundred forty-seven million, nine hundred nine thousand, seven hundred forty-nine".