1961313567 has 4 divisors (see below), whose sum is σ = 2615084760. Its totient is φ = 1307542376.

The previous prime is 1961313547. The next prime is 1961313583. The reversal of 1961313567 is 7653131691.

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 1961313567 - 2⁶ = 1961313503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961313527) 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, 326885592 + ... + 326885597.

It is an arithmetic number, because the mean of its divisors is an integer number (653771190).

Almost surely, 2^1961313567 is an apocalyptic number.

1961313567 is a deficient number, since it is larger than the sum of its proper divisors (653771193).

1961313567 is an equidigital number, since it uses as much as digits as its factorization.

1961313567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653771192.

The product of its digits is 102060, while the sum is 42.

The square root of 1961313567 is about 44286.7199846636. The cubic root of 1961313567 is about 1251.7444586520.

The spelling of 1961313567 in words is "one billion, nine hundred sixty-one million, three hundred thirteen thousand, five hundred sixty-seven".