61673409 has 36 divisors (see below), whose sum is σ = 104676624. Its totient is φ = 34885872.

The previous prime is 61673407. The next prime is 61673429. The reversal of 61673409 is 90437616.

61673409 is a `hidden beast` number, since 616 + 7 + 34 + 0 + 9 = 666.

It is not a de Polignac number, because 61673409 - 2¹ = 61673407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61673407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 46534 + ... + 47840.

It is an arithmetic number, because the mean of its divisors is an integer number (2907684).

Almost surely, 2^61673409 is an apocalyptic number.

It is an amenable number.

61673409 is a deficient number, since it is larger than the sum of its proper divisors (43003215).

61673409 is a wasteful number, since it uses less digits than its factorization.

61673409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434 (or 1424 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 61673409 is about 7853.2419420262. The cubic root of 61673409 is about 395.0929845720.

The spelling of 61673409 in words is "sixty-one million, six hundred seventy-three thousand, four hundred nine".