406671749 has 4 divisors (see below), whose sum is σ = 443641920. Its totient is φ = 369701580.

The previous prime is 406671737. The next prime is 406671761. The reversal of 406671749 is 947176604.

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 an interprime number because it is at equal distance from previous prime (406671737) and next prime (406671761).

It is a cyclic number.

It is not a de Polignac number, because 406671749 - 2⁸ = 406671493 is a prime.

It is a super-2 number, since 2×406671749² = 330763822869438002, 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 (406671799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18485069 + ... + 18485090.

It is an arithmetic number, because the mean of its divisors is an integer number (110910480).

Almost surely, 2^406671749 is an apocalyptic number.

It is an amenable number.

406671749 is a deficient number, since it is larger than the sum of its proper divisors (36970171).

406671749 is a wasteful number, since it uses less digits than its factorization.

406671749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36970170.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 406671749 is about 20166.1039618465. The cubic root of 406671749 is about 740.8802217455.

The spelling of 406671749 in words is "four hundred six million, six hundred seventy-one thousand, seven hundred forty-nine".