1373657449 has 16 divisors (see below), whose sum is σ = 1430731008. Its totient is φ = 1317745152.

The previous prime is 1373657437. The next prime is 1373657479. The reversal of 1373657449 is 9447563731.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1373657449 - 2¹³ = 1373649257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1373657429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1244832 + ... + 1245934.

It is an arithmetic number, because the mean of its divisors is an integer number (89420688).

Almost surely, 2^1373657449 is an apocalyptic number.

It is an amenable number.

1373657449 is a deficient number, since it is larger than the sum of its proper divisors (57073559).

1373657449 is a wasteful number, since it uses less digits than its factorization.

1373657449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584.

The product of its digits is 1905120, while the sum is 49.

The square root of 1373657449 is about 37062.8850603943. The cubic root of 1373657449 is about 1111.6280114661.

The spelling of 1373657449 in words is "one billion, three hundred seventy-three million, six hundred fifty-seven thousand, four hundred forty-nine".