1961513471 has 4 divisors (see below), whose sum is σ = 1972350744. Its totient is φ = 1950676200.

The previous prime is 1961513467. The next prime is 1961513473. The reversal of 1961513471 is 1743151691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1743151691 = 29 ⋅60108679.

It is a cyclic number.

It is not a de Polignac number, because 1961513471 - 2² = 1961513467 is a prime.

It is a super-3 number, since 3×1961513471³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961513473) 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, 5418365 + ... + 5418726.

It is an arithmetic number, because the mean of its divisors is an integer number (493087686).

Almost surely, 2^1961513471 is an apocalyptic number.

1961513471 is a deficient number, since it is larger than the sum of its proper divisors (10837273).

1961513471 is a wasteful number, since it uses less digits than its factorization.

1961513471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10837272.

The product of its digits is 22680, while the sum is 38.

The square root of 1961513471 is about 44288.9768565498. The cubic root of 1961513471 is about 1251.7869846114.

The spelling of 1961513471 in words is "one billion, nine hundred sixty-one million, five hundred thirteen thousand, four hundred seventy-one".