1613690 has 16 divisors (see below), whose sum is σ = 3128328. Its totient is φ = 595776.

The previous prime is 1613683. The next prime is 1613707. The reversal of 1613690 is 963161.

It can be written as a sum of positive squares in 4 ways, for example, as 844561 + 769129 = 919^2 + 877^2 .

It is a super-2 number, since 2×1613690² = 5207990832200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6077 + ... + 6336.

2^1613690 is an apocalyptic number.

1613690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1613690 is a deficient number, since it is larger than the sum of its proper divisors (1514638).

1613690 is a wasteful number, since it uses less digits than its factorization.

1613690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12433.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1613690 is about 1270.3109855465. The cubic root of 1613690 is about 117.2933443129.

The spelling of 1613690 in words is "one million, six hundred thirteen thousand, six hundred ninety".