61508963 has 4 divisors (see below), whose sum is σ = 62939448. Its totient is φ = 60078480.

The previous prime is 61508957. The next prime is 61508983. The reversal of 61508963 is 36980516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61508963 - 2¹⁶ = 61443427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61508983) 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, 715178 + ... + 715263.

It is an arithmetic number, because the mean of its divisors is an integer number (15734862).

Almost surely, 2^61508963 is an apocalyptic number.

61508963 is a deficient number, since it is larger than the sum of its proper divisors (1430485).

61508963 is a wasteful number, since it uses less digits than its factorization.

61508963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430484.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 61508963 is about 7842.7650098674. The cubic root of 61508963 is about 394.7415133067.

The spelling of 61508963 in words is "sixty-one million, five hundred eight thousand, nine hundred sixty-three".