61939397 has 16 divisors (see below), whose sum is σ = 69242880. Its totient is φ = 55036800.

The previous prime is 61939357. The next prime is 61939403. The reversal of 61939397 is 79393916.

It is not a de Polignac number, because 61939397 - 2¹⁴ = 61923013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61939327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41372 + ... + 42842.

It is an arithmetic number, because the mean of its divisors is an integer number (4327680).

Almost surely, 2^61939397 is an apocalyptic number.

It is an amenable number.

61939397 is a deficient number, since it is larger than the sum of its proper divisors (7303483).

61939397 is a wasteful number, since it uses less digits than its factorization.

61939397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604.

The product of its digits is 275562, while the sum is 47.

The square root of 61939397 is about 7870.1586388077. The cubic root of 61939397 is about 395.6601618823.

The spelling of 61939397 in words is "sixty-one million, nine hundred thirty-nine thousand, three hundred ninety-seven".