61726989 has 16 divisors (see below), whose sum is σ = 84870720. Its totient is φ = 39876480.

The previous prime is 61726967. The next prime is 61726999. The reversal of 61726989 is 98962716.

It is not a de Polignac number, because 61726989 - 2¹¹ = 61724941 is a prime.

It is a super-2 number, since 2×61726989² = 7620442342012242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61726999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30202 + ... + 32180.

It is an arithmetic number, because the mean of its divisors is an integer number (5304420).

Almost surely, 2^61726989 is an apocalyptic number.

It is an amenable number.

61726989 is a deficient number, since it is larger than the sum of its proper divisors (23143731).

61726989 is a wasteful number, since it uses less digits than its factorization.

61726989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300.

The product of its digits is 326592, while the sum is 48.

The square root of 61726989 is about 7856.6525314538. The cubic root of 61726989 is about 395.2073664159.

The spelling of 61726989 in words is "sixty-one million, seven hundred twenty-six thousand, nine hundred eighty-nine".