61951489 has 12 divisors (see below), whose sum is σ = 65548224. Its totient is φ = 58439304.

The previous prime is 61951469. The next prime is 61951493. The reversal of 61951489 is 98415916.

It is not a de Polignac number, because 61951489 - 2¹¹ = 61949441 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61951469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370884 + ... + 371050.

It is an arithmetic number, because the mean of its divisors is an integer number (5462352).

Almost surely, 2^61951489 is an apocalyptic number.

It is an amenable number.

61951489 is a deficient number, since it is larger than the sum of its proper divisors (3596735).

61951489 is a wasteful number, since it uses less digits than its factorization.

61951489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 317 counting only the distinct ones).

The product of its digits is 77760, while the sum is 43.

The square root of 61951489 is about 7870.9268196319. The cubic root of 61951489 is about 395.6859075391.

The spelling of 61951489 in words is "sixty-one million, nine hundred fifty-one thousand, four hundred eighty-nine".