47021690 has 8 divisors (see below), whose sum is σ = 84639060. Its totient is φ = 18808672.

The previous prime is 47021687. The next prime is 47021693. The reversal of 47021690 is 9612074.

It is an interprime number because it is at equal distance from previous prime (47021687) and next prime (47021693).

It can be written as a sum of positive squares in 2 ways, for example, as 46963609 + 58081 = 6853^2 + 241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×47021690² = 4422078660912200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47021693) 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, 2351075 + ... + 2351094.

Almost surely, 2^47021690 is an apocalyptic number.

47021690 is a deficient number, since it is larger than the sum of its proper divisors (37617370).

47021690 is a wasteful number, since it uses less digits than its factorization.

47021690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4702176.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 47021690 is about 6857.2363237678. The cubic root of 47021690 is about 360.9381139711.

The spelling of 47021690 in words is "forty-seven million, twenty-one thousand, six hundred ninety".