4472623781 has 4 divisors (see below), whose sum is σ = 4473504672. Its totient is φ = 4471742892.

The previous prime is 4472623657. The next prime is 4472623843. The reversal of 4472623781 is 1873262744.

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 4472623781 - 2²² = 4468429477 is a prime.

It is a super-2 number, since 2×4472623781² = 40008726972733471922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4472620781) 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, 432785 + ... + 442998.

It is an arithmetic number, because the mean of its divisors is an integer number (1118376168).

Almost surely, 2^4472623781 is an apocalyptic number.

It is an amenable number.

4472623781 is a deficient number, since it is larger than the sum of its proper divisors (880891).

4472623781 is an equidigital number, since it uses as much as digits as its factorization.

4472623781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880890.

The product of its digits is 451584, while the sum is 44.

The square root of 4472623781 is about 66877.6777482592. The cubic root of 4472623781 is about 1647.6088758091.

The spelling of 4472623781 in words is "four billion, four hundred seventy-two million, six hundred twenty-three thousand, seven hundred eighty-one".