47509642 has 4 divisors (see below), whose sum is σ = 71264466. Its totient is φ = 23754820.

The previous prime is 47509619. The next prime is 47509661. The reversal of 47509642 is 24690574.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 47045881 + 463761 = 6859^2 + 681^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11877409 + ... + 11877412.

Almost surely, 2^47509642 is an apocalyptic number.

47509642 is a deficient number, since it is larger than the sum of its proper divisors (23754824).

47509642 is a wasteful number, since it uses less digits than its factorization.

47509642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23754823.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 47509642 is about 6892.7238447511. The cubic root of 47509642 is about 362.1823252561.

The spelling of 47509642 in words is "forty-seven million, five hundred nine thousand, six hundred forty-two".