1609429461 has 4 divisors (see below), whose sum is σ = 2145905952. Its totient is φ = 1072952972.

The previous prime is 1609429427. The next prime is 1609429463. The reversal of 1609429461 is 1649249061.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1649249061 = 3 ⋅549749687.

It is a cyclic number.

It is not a de Polignac number, because 1609429461 - 2⁶ = 1609429397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609429463) 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, 268238241 + ... + 268238246.

It is an arithmetic number, because the mean of its divisors is an integer number (536476488).

Almost surely, 2^1609429461 is an apocalyptic number.

It is an amenable number.

1609429461 is a deficient number, since it is larger than the sum of its proper divisors (536476491).

1609429461 is an equidigital number, since it uses as much as digits as its factorization.

1609429461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536476490.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1609429461 is about 40117.6951107613. The cubic root of 1609429461 is about 1171.9002555894.

The spelling of 1609429461 in words is "one billion, six hundred nine million, four hundred twenty-nine thousand, four hundred sixty-one".