61490147 has 4 divisors (see below), whose sum is σ = 62798496. Its totient is φ = 60181800.

The previous prime is 61490131. The next prime is 61490153. The reversal of 61490147 is 74109416.

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 61490147 - 2⁴ = 61490131 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61498147) 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, 654104 + ... + 654197.

It is an arithmetic number, because the mean of its divisors is an integer number (15699624).

Almost surely, 2^61490147 is an apocalyptic number.

61490147 is a deficient number, since it is larger than the sum of its proper divisors (1308349).

61490147 is a wasteful number, since it uses less digits than its factorization.

61490147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308348.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 61490147 is about 7841.5653411803. The cubic root of 61490147 is about 394.7012578521.

The spelling of 61490147 in words is "sixty-one million, four hundred ninety thousand, one hundred forty-seven".