60978509 has 4 divisors (see below), whose sum is σ = 61888704. Its totient is φ = 60068316.

The previous prime is 60978487. The next prime is 60978527. The reversal of 60978509 is 90587906.

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.

It is a cyclic number.

It is not a de Polignac number, because 60978509 - 2¹² = 60974413 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 60978509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60978559) 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, 454997 + ... + 455130.

It is an arithmetic number, because the mean of its divisors is an integer number (15472176).

Almost surely, 2^60978509 is an apocalyptic number.

It is an amenable number.

60978509 is a deficient number, since it is larger than the sum of its proper divisors (910195).

60978509 is an equidigital number, since it uses as much as digits as its factorization.

60978509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910194.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 60978509 is about 7808.8737344127. The cubic root of 60978509 is about 393.6034837758.

The spelling of 60978509 in words is "sixty million, nine hundred seventy-eight thousand, five hundred nine".