1949609497 has 4 divisors (see below), whose sum is σ = 2126846736. Its totient is φ = 1772372260.

The previous prime is 1949609489. The next prime is 1949609531. The reversal of 1949609497 is 7949069491.

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 1949609497 - 2³ = 1949609489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949609407) 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, 88618603 + ... + 88618624.

It is an arithmetic number, because the mean of its divisors is an integer number (531711684).

Almost surely, 2^1949609497 is an apocalyptic number.

It is an amenable number.

1949609497 is a deficient number, since it is larger than the sum of its proper divisors (177237239).

1949609497 is a wasteful number, since it uses less digits than its factorization.

1949609497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177237238.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The square root of 1949609497 is about 44154.3825344665. The cubic root of 1949609497 is about 1249.2495756074.

The spelling of 1949609497 in words is "one billion, nine hundred forty-nine million, six hundred nine thousand, four hundred ninety-seven".