634742045 has 16 divisors (see below), whose sum is σ = 886930560. Its totient is φ = 427038144.

The previous prime is 634742041. The next prime is 634742047. The reversal of 634742045 is 540247436.

It is a cyclic number.

It is not a de Polignac number, because 634742045 - 2² = 634742041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a junction number, because it is equal to n+sod(n) for n = 634741996 and 634742014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634742041) 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, 169235 + ... + 172944.

It is an arithmetic number, because the mean of its divisors is an integer number (55433160).

Almost surely, 2^634742045 is an apocalyptic number.

It is an amenable number.

634742045 is a deficient number, since it is larger than the sum of its proper divisors (252188515).

634742045 is a wasteful number, since it uses less digits than its factorization.

634742045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342244.

The product of its (nonzero) digits is 80640, while the sum is 35.

The square root of 634742045 is about 25194.0875008404. The cubic root of 634742045 is about 859.4074000258.

The spelling of 634742045 in words is "six hundred thirty-four million, seven hundred forty-two thousand, forty-five".