47721099 has 16 divisors (see below), whose sum is σ = 65907072. Its totient is φ = 30692928.

The previous prime is 47721071. The next prime is 47721131. The reversal of 47721099 is 99012774.

47721099 = 702² + 703² + ... + 787².

It is not a de Polignac number, because 47721099 - 2¹⁵ = 47688331 is a prime.

It is a super-4 number, since 4×47721099⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (47721199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8479 + ... + 12935.

It is an arithmetic number, because the mean of its divisors is an integer number (4119192).

Almost surely, 2^47721099 is an apocalyptic number.

47721099 is a deficient number, since it is larger than the sum of its proper divisors (18185973).

47721099 is a wasteful number, since it uses less digits than its factorization.

47721099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4586.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 47721099 is about 6908.0459610515. The cubic root of 47721099 is about 362.7188664809.

The spelling of 47721099 in words is "forty-seven million, seven hundred twenty-one thousand, ninety-nine".