61690501 has 4 divisors (see below), whose sum is σ = 65319372. Its totient is φ = 58061632.

The previous prime is 61690487. The next prime is 61690523. The reversal of 61690501 is 10509616.

61690501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36590401 + 25100100 = 6049^2 + 5010^2 .

It is a cyclic number.

It is not a de Polignac number, because 61690501 - 2⁷ = 61690373 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 61690501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61690561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1814410 + ... + 1814443.

It is an arithmetic number, because the mean of its divisors is an integer number (16329843).

Almost surely, 2^61690501 is an apocalyptic number.

It is an amenable number.

61690501 is a deficient number, since it is larger than the sum of its proper divisors (3628871).

61690501 is a wasteful number, since it uses less digits than its factorization.

61690501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3628870.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 61690501 is about 7854.3300796440. The cubic root of 61690501 is about 395.1294795308.

The spelling of 61690501 in words is "sixty-one million, six hundred ninety thousand, five hundred one".