1613977 has 8 divisors (see below), whose sum is σ = 1673672. Its totient is φ = 1555200.

The previous prime is 1613959. The next prime is 1613981. The reversal of 1613977 is 7793161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 259081 + 1354896 = 509^2 + 1164^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1613977 is a prime.

It is a Duffinian number.

1613977 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613947) 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, 6577 + ... + 6817.

It is an arithmetic number, because the mean of its divisors is an integer number (209209).

2^1613977 is an apocalyptic number.

It is an amenable number.

1613977 is a deficient number, since it is larger than the sum of its proper divisors (59695).

1613977 is a wasteful number, since it uses less digits than its factorization.

1613977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459.

The product of its digits is 7938, while the sum is 34.

The square root of 1613977 is about 1270.4239449884. The cubic root of 1613977 is about 117.3002975679.

The spelling of 1613977 in words is "one million, six hundred thirteen thousand, nine hundred seventy-seven".