947478377 has 4 divisors (see below), whose sum is σ = 997345680. Its totient is φ = 897611076.

The previous prime is 947478373. The next prime is 947478407. The reversal of 947478377 is 773874749.

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 a cyclic number.

It is not a de Polignac number, because 947478377 - 2² = 947478373 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (947478373) 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, 24933623 + ... + 24933660.

It is an arithmetic number, because the mean of its divisors is an integer number (249336420).

Almost surely, 2^947478377 is an apocalyptic number.

It is an amenable number.

947478377 is a deficient number, since it is larger than the sum of its proper divisors (49867303).

947478377 is a wasteful number, since it uses less digits than its factorization.

947478377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49867302.

The product of its digits is 8297856, while the sum is 56.

The square root of 947478377 is about 30781.1367074057. The cubic root of 947478377 is about 982.1770209588.

The spelling of 947478377 in words is "nine hundred forty-seven million, four hundred seventy-eight thousand, three hundred seventy-seven".