461772019 has 4 divisors (see below), whose sum is σ = 463439344. Its totient is φ = 460104696.

The previous prime is 461771983. The next prime is 461772049. The reversal of 461772019 is 910277164.

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 461772019 - 2¹⁷ = 461640947 is a prime.

It is a super-2 number, since 2×461772019² = 426466795062672722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (461772049) 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, 833247 + ... + 833800.

It is an arithmetic number, because the mean of its divisors is an integer number (115859836).

Almost surely, 2^461772019 is an apocalyptic number.

461772019 is a deficient number, since it is larger than the sum of its proper divisors (1667325).

461772019 is a wasteful number, since it uses less digits than its factorization.

461772019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667324.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 461772019 is about 21488.8812877730. The cubic root of 461772019 is about 772.9342246526.

It can be divided in two parts, 4617 and 72019, that added together give a triangular number (76636 = T₃₉₁).

The spelling of 461772019 in words is "four hundred sixty-one million, seven hundred seventy-two thousand, nineteen".