947252261 has 4 divisors (see below), whose sum is σ = 947356224. Its totient is φ = 947148300.

The previous prime is 947252249. The next prime is 947252269. The reversal of 947252261 is 162252749.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 162252749 = 157 ⋅1033457.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-947252261 is a prime.

It is a super-2 number, since 2×947252261² = 1794573691939224242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947252269) 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, 36845 + ... + 57026.

It is an arithmetic number, because the mean of its divisors is an integer number (236839056).

Almost surely, 2^947252261 is an apocalyptic number.

It is an amenable number.

947252261 is a deficient number, since it is larger than the sum of its proper divisors (103963).

947252261 is a wasteful number, since it uses less digits than its factorization.

947252261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103962.

The product of its digits is 60480, while the sum is 38.

The square root of 947252261 is about 30777.4635244687. The cubic root of 947252261 is about 982.0988824620.

The spelling of 947252261 in words is "nine hundred forty-seven million, two hundred fifty-two thousand, two hundred sixty-one".