61399974 has 8 divisors (see below), whose sum is σ = 122799960. Its totient is φ = 20466656.

The previous prime is 61399969. The next prime is 61399979. The reversal of 61399974 is 47999316.

It is an interprime number because it is at equal distance from previous prime (61399969) and next prime (61399979).

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

61399974 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61399979) 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, 5116659 + ... + 5116670.

It is an arithmetic number, because the mean of its divisors is an integer number (15349995).

Almost surely, 2^61399974 is an apocalyptic number.

61399974 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61399974 is a wasteful number, since it uses less digits than its factorization.

61399974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10233334.

The product of its digits is 367416, while the sum is 48.

The square root of 61399974 is about 7835.8135506149. The cubic root of 61399974 is about 394.5082252538.

The spelling of 61399974 in words is "sixty-one million, three hundred ninety-nine thousand, nine hundred seventy-four".