1961197534 has 8 divisors (see below), whose sum is σ = 3069700560. Its totient is φ = 937964016.

The previous prime is 1961197523. The next prime is 1961197541. The reversal of 1961197534 is 4357911691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1961197534³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 42634729 = 1961197534 / (1 + 9 + 6 + 1 + 1 + 9 + 7 + 5 + 3 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21317319 + ... + 21317410.

It is an arithmetic number, because the mean of its divisors is an integer number (383712570).

Almost surely, 2^1961197534 is an apocalyptic number.

1961197534 is a deficient number, since it is larger than the sum of its proper divisors (1108503026).

1961197534 is a wasteful number, since it uses less digits than its factorization.

1961197534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42634754.

The product of its digits is 204120, while the sum is 46.

The square root of 1961197534 is about 44285.4099450372. The cubic root of 1961197534 is about 1251.7197734051.

The spelling of 1961197534 in words is "one billion, nine hundred sixty-one million, one hundred ninety-seven thousand, five hundred thirty-four".