61900619 has 8 divisors (see below), whose sum is σ = 67644480. Its totient is φ = 56176200.

The previous prime is 61900541. The next prime is 61900633. The reversal of 61900619 is 91600916.

It is a happy number.

61900619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61900619 is a prime.

It is a super-2 number, since 2×61900619² = 7663373265166322, which contains 22 as substring.

61900619 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61900019) 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 7 ways as a sum of consecutive naturals, for example, 2264 + ... + 11354.

It is an arithmetic number, because the mean of its divisors is an integer number (8455560).

Almost surely, 2^61900619 is an apocalyptic number.

61900619 is a deficient number, since it is larger than the sum of its proper divisors (5743861).

61900619 is a wasteful number, since it uses less digits than its factorization.

61900619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9721.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 61900619 is about 7867.6946432866. The cubic root of 61900619 is about 395.5775751739.

It can be divided in two parts, 61900 and 619, that multiplied together give a square (38316100 = 6190²).

The spelling of 61900619 in words is "sixty-one million, nine hundred thousand, six hundred nineteen".