761989 has 4 divisors (see below), whose sum is σ = 763840. Its totient is φ = 760140.

The previous prime is 761983. The next prime is 761993. The reversal of 761989 is 989167.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989167 = 277 ⋅3571.

It is a cyclic number.

It is not a de Polignac number, because 761989 - 2⁷ = 761861 is a prime.

It is a super-2 number, since 2×761989² = 1161254472242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761983) 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, 4 + ... + 1234.

It is an arithmetic number, because the mean of its divisors is an integer number (190960).

2⁷⁶¹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

761989 is a deficient number, since it is larger than the sum of its proper divisors (1851).

761989 is a wasteful number, since it uses less digits than its factorization.

761989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850.

The product of its digits is 27216, while the sum is 40.

The square root of 761989 is about 872.9198130413. The cubic root of 761989 is about 91.3375940021.

The spelling of 761989 in words is "seven hundred sixty-one thousand, nine hundred eighty-nine".