1991702 has 8 divisors (see below), whose sum is σ = 3007056. Its totient is φ = 989352.

The previous prime is 1991681. The next prime is 1991707. The reversal of 1991702 is 2071991.

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

It is a super-4 number, since 4×1991702⁴ (a number of 26 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1991707) 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, 2858 + ... + 3485.

It is an arithmetic number, because the mean of its divisors is an integer number (375882).

2^1991702 is an apocalyptic number.

1991702 is a deficient number, since it is larger than the sum of its proper divisors (1015354).

1991702 is a wasteful number, since it uses less digits than its factorization.

1991702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6502.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 1991702 is about 1411.2767269391. The cubic root of 1991702 is about 125.8176163676.

The spelling of 1991702 in words is "one million, nine hundred ninety-one thousand, seven hundred two".