947469899 has 4 divisors (see below), whose sum is σ = 950841960. Its totient is φ = 944097840.

The previous prime is 947469883. The next prime is 947469931. The reversal of 947469899 is 998964749.

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

It is a cyclic number.

It is not a de Polignac number, because 947469899 - 2⁴ = 947469883 is a prime.

It is a super-2 number, since 2×947469899² = 1795398419022140402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (947469799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1685609 + ... + 1686170.

It is an arithmetic number, because the mean of its divisors is an integer number (237710490).

Almost surely, 2^947469899 is an apocalyptic number.

947469899 is a deficient number, since it is larger than the sum of its proper divisors (3372061).

947469899 is a wasteful number, since it uses less digits than its factorization.

947469899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372060.

The product of its digits is 35271936, while the sum is 65.

The square root of 947469899 is about 30780.9989928852. The cubic root of 947469899 is about 982.1740914561.

The spelling of 947469899 in words is "nine hundred forty-seven million, four hundred sixty-nine thousand, eight hundred ninety-nine".