745720453 has 8 divisors (see below), whose sum is σ = 792286488. Its totient is φ = 699454464.

The previous prime is 745720447. The next prime is 745720501. The reversal of 745720453 is 354027547.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 179613604 + 566106849 = 13402^2 + 23793^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 745720453 - 2¹⁷ = 745589381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745720153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69876 + ... + 79837.

It is an arithmetic number, because the mean of its divisors is an integer number (99035811).

Almost surely, 2^745720453 is an apocalyptic number.

It is an amenable number.

745720453 is a deficient number, since it is larger than the sum of its proper divisors (46566035).

745720453 is a wasteful number, since it uses less digits than its factorization.

745720453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150023.

The product of its (nonzero) digits is 117600, while the sum is 37.

The square root of 745720453 is about 27307.8826165633. The cubic root of 745720453 is about 906.8288984106.

The spelling of 745720453 in words is "seven hundred forty-five million, seven hundred twenty thousand, four hundred fifty-three".