61231379 has 4 divisors (see below), whose sum is σ = 66797880. Its totient is φ = 55664880.

The previous prime is 61231361. The next prime is 61231393. The reversal of 61231379 is 97313216.

It is a happy number.

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 61231379 - 2⁸ = 61231123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61231309) 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, 2783234 + ... + 2783255.

It is an arithmetic number, because the mean of its divisors is an integer number (16699470).

Almost surely, 2^61231379 is an apocalyptic number.

61231379 is a deficient number, since it is larger than the sum of its proper divisors (5566501).

61231379 is a wasteful number, since it uses less digits than its factorization.

61231379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5566500.

The product of its digits is 6804, while the sum is 32.

The square root of 61231379 is about 7825.0481787654. The cubic root of 61231379 is about 394.1468077031.

The spelling of 61231379 in words is "sixty-one million, two hundred thirty-one thousand, three hundred seventy-nine".