673557401 has 4 divisors (see below), whose sum is σ = 734789904. Its totient is φ = 612324900.

The previous prime is 673557383. The next prime is 673557433. The reversal of 673557401 is 104755376.

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 de Polignac number, because none of the positive numbers 2^k-673557401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (673557701) 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, 30616235 + ... + 30616256.

It is an arithmetic number, because the mean of its divisors is an integer number (183697476).

Almost surely, 2^673557401 is an apocalyptic number.

It is an amenable number.

673557401 is a deficient number, since it is larger than the sum of its proper divisors (61232503).

673557401 is a wasteful number, since it uses less digits than its factorization.

673557401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61232502.

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 673557401 is about 25952.9844333942. The cubic root of 673557401 is about 876.5799594416.

The spelling of 673557401 in words is "six hundred seventy-three million, five hundred fifty-seven thousand, four hundred one".