47345661 has 64 divisors (see below), whose sum is σ = 82944000. Its totient is φ = 26389440.

The previous prime is 47345651. The next prime is 47345677. The reversal of 47345661 is 16654374.

It is a happy number.

It is not a de Polignac number, because 47345661 - 2⁹ = 47345149 is a prime.

It is a super-2 number, since 2×47345661² = 4483223231053842, which contains 22 as substring.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47345651) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 197980 + ... + 198218.

It is an arithmetic number, because the mean of its divisors is an integer number (1296000).

Almost surely, 2^47345661 is an apocalyptic number.

It is an amenable number.

47345661 is a deficient number, since it is larger than the sum of its proper divisors (35598339).

47345661 is a wasteful number, since it uses less digits than its factorization.

47345661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 305 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 47345661 is about 6880.8183379595. The cubic root of 47345661 is about 361.7651504211.

The spelling of 47345661 in words is "forty-seven million, three hundred forty-five thousand, six hundred sixty-one".