1613445077 has 4 divisors (see below), whose sum is σ = 1614750636. Its totient is φ = 1612139520.

The previous prime is 1613445037. The next prime is 1613445083. The reversal of 1613445077 is 7705443161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7705443161 = 13 ⋅592726397.

It can be written as a sum of positive squares in 2 ways, for example, as 1052418481 + 561026596 = 32441^2 + 23686^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613445077 - 2¹⁴ = 1613428693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1613445077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613445007) 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, 650924 + ... + 653397.

It is an arithmetic number, because the mean of its divisors is an integer number (403687659).

Almost surely, 2^1613445077 is an apocalyptic number.

It is an amenable number.

1613445077 is a deficient number, since it is larger than the sum of its proper divisors (1305559).

1613445077 is a wasteful number, since it uses less digits than its factorization.

1613445077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305558.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 1613445077 is about 40167.7118716015. The cubic root of 1613445077 is about 1172.8740982084.

The spelling of 1613445077 in words is "one billion, six hundred thirteen million, four hundred forty-five thousand, seventy-seven".