60691399 has 2 divisors, whose sum is σ = 60691400. Its totient is φ = 60691398.

The previous prime is 60691387. The next prime is 60691409. The reversal of 60691399 is 99319606.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60691399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60691349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30345699 + 30345700.

It is an arithmetic number, because the mean of its divisors is an integer number (30345700).

Almost surely, 2^60691399 is an apocalyptic number.

60691399 is a deficient number, since it is larger than the sum of its proper divisors (1).

60691399 is an equidigital number, since it uses as much as digits as its factorization.

60691399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 60691399 is about 7790.4684711511. The cubic root of 60691399 is about 392.9847667653.

The spelling of 60691399 in words is "sixty million, six hundred ninety-one thousand, three hundred ninety-nine".